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GS Paper III

Mains · GS Paper III · 19 questions

Disaster management

Every question UPSC has set on this line of the GS Paper III syllabus, newest first — with an approach for each.

Questions per year: 2016: 2, 2017: 1, 2018: 1, 2019: 2, 2020: 1, 2021: 2, 2022: 1, 2023: 1, 2024: 2, 2025: 0, 2026: 2 Asked in 10 of 11 years

UPSC syllabus (verbatim): “Disaster and disaster management.” Sub-topics in the detailed syllabus →

2026

GS Paper III 2026 · Q7

10 marks · 150 words X-Ray · Core #20

Discuss how the contradiction between ‘rapid infrastructure development’ and ‘disaster-risk reduction’ in ecologically-sensitive areas of India can be managed, with suitable examples.

🧭 How to think about this question · directive: “discuss”

Decode the demand

  • Directive 'discuss': the question hands you a contradiction and asks how it is managed; so show both horns first, then the reconciliation, not a lecture on either alone.
  • The issue in one line: fast roads, tunnels, dams and tourism in the Himalaya, Western Ghats and coasts can create the very hazards they are meant to withstand.
  • Three things to answer: why the infrastructure is still needed, why speed in fragile terrain raises risk, and the tools (planning, design, law, warning) that reconcile them, each tied to a real example.
  • The trap: writing an anti-development or anti-environment essay. The marks lie in named incidents (Kedarnath, Chamoli, Joshimath, Wayanad) and named fixes (Char Dham case, Kasturirangan, CDRI).

Think in a structure

  • Open with two 2023 events that make the contradiction visible, then one line turning to how it is managed.
  • First heading: a three-row table of driver → hazard → example, then two points: the need is legitimate, the method is the problem.
  • Second heading: a flowchart of the risk-informed sequence, then one point per tool with its example as a sub-point; the Char Dham verdict is the model of balance by law.
  • End positively from the district officer's seat with four concrete measures, and anchor the conclusion on SDG 9's own words, 'build resilient infrastructure'.
Facts checked at source (4)· open
  • The Coalition for Disaster Resilient Infrastructure was established in 2019 under India's leadership with UNDRR support, as a global partnership to make infrastructure resilient to climate and disaster risk.UN Department of Economic and Social Affairs — SDG partnership entry: Coalition for Disaster Resilient Infrastructure (CDRI) ↗“The Coalition for Disaster Resilient Infrastructure (CDRI) – established in 2019 under the leadership of the Government of India and with the support UNDRR is a multi-stakeholder global partnership of national governments, UN agencies and programmes, multilateral development banks, the private sector, and academic institutions.”
  • In the Char Dham case (14 December 2021) the Supreme Court set up an Oversight Committee chaired by Justice A.K. Sikri, reporting directly to the Court.Supreme Court — Citizens for Green Doon v. Union of India, judgment of 14 December 2021 ↗“we also set up an ‘Oversight Committee’, which shall report directly to this Court. This Committee shall be chaired by Shri Justice Arjan Kumar Sikri, former Judge”
  • The MoRTH circular of 2020, which the Court considered, sets a 7 m carriageway with 1.5 m paved shoulders for strategic border roads in hilly terrain.Supreme Court — Citizens for Green Doon v. Union of India, judgment of 14 December 2021 ↗“For roads in hilly and mountainous terrain which act as feeder roads to the Indo-China border or are of strategic importance for national security, the carriageway width should be 7m with 1.5m paved shoulder on either side.”
  • Sustainable Development Goal 9 is titled 'Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation'.United Nations — Sustainable Development Goals, Goal 9 ↗“Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation”

Question: UPSC's CS (Main) 2026, GS Paper III — paper ↗. Guidance: Minimalist IAS, checked 8 Nov 2026 (how we verify). ·

Model answer· 374words · Minimalist IAS

Joshimath's land subsidence and the Silkyara tunnel collapse, both in 2023, showed how projects in fragile terrain can magnify the very hazards they must survive. The contradiction is real, but it is managed by building so that risk falls rather than rises.

Why rapid infrastructure and disaster-risk reduction collide

Driver of infrastructureHazard it createsExample
Highways and tunnelsSlope cutting, blasting, muck dumpingKedarnath 2013, Silkyara 2023
Hydropower on young riversDams in flash-flood and glacial-burst pathsChamoli 2021
Tourism and settlement growthLoad on unstable slopes and floodplainsJoshimath 2023, Wayanad 2024
  • The need is legitimate: connectivity, border defence, power and livelihoods for remote regions cannot wait for geology to settle.
  • The method is the problem: piecemeal clearances and speed-driven designs ignore cumulative impact across a valley; the Himalaya is still rising and seismically active.

The full answer goes on to cover

  1. How the contradiction can be managed
  2. What I would do as the district officer

With 1 flowchart you can reproduce in the exam.

Read the full model answer (374 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 8 Nov 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

GS Paper III 2026 · Q18

15 marks · 250 words

“Community participation is the cornerstone of effective disaster management”. Analyse this statement with suitable examples from India. Also discuss the challenges to community participation and measures to strengthen it.

🧭 How to think about this question · directive: “analyse / discuss”

Decode the demand

  • Two directives, three parts: 'analyse' the statement with Indian examples, then 'discuss' the challenges and the measures. Each needs its own heading; the examples are not optional decoration, they carry the analysis.
  • The claim in one line: disaster management works only when the people at risk plan, warn, rescue and rebuild themselves, with the state as enabler.
  • What 'analyse' asks: break the claim into reasons (knowledge, speed, trust, ownership, inclusion, recovery) and show each with a real Indian case; do not just list disasters.
  • The trap: writing a heroic narrative of fishermen and volunteers with no mechanism. The examiner wants the systems: shelter committees, village plans, volunteer schemes, legal backing.

Think in a structure

  • Open with the golden-hour fact (neighbours arrive before agencies) and the Sendai Framework's 'all-of-society' call, then turn to the demand.
  • Hub for the first part: community at the centre with five or six spokes, each spoke a point with an Indian example as its sub-point; close the part with the volunteer numbers.
  • Challenges in dimensions: perception, planning, exclusion, local bodies, volunteers, cities; one line each with the reason.
  • Measures from the district officer's seat: a flowchart of the bottom-up planning cycle, then concrete steps anchored in real schemes and the 2025 amendment; end on the Sendai shift from managing disasters to managing risk.
Facts checked at source (4)· open
  • Under the Aapda Mitra scheme, one lakh community volunteers have been trained in disaster response across 350 districts.PIB — Prevention of losses from natural disasters (Parliament reply) ↗“Central Government has also implemented Aapda Mitra scheme, under which 1,00,000 community volunteers have been trained in disaster response, covering 350 Districts”
  • Yuva Aapda Mitra Scheme (2024-25): training 2,37,326 volunteers from NCC, NSS, NYKS and Bharat Scouts and Guides in disaster response across 315 disaster-prone districts.PIB — Rajya Sabha reply on community volunteers in disaster response, Ministry of Home Affairs (2025) ↗“(YAMS) in the year 2024-25 to train 2,37,326 volunteers from National Cadet Core (NCC), National Service Scheme (NSS), Nehru Yuva Kendra Sangathan ( NYKS) and Bharat Scouts & Guides (BS&G)”
  • UNDRR: the Sendai Framework, adopted on 18 March 2015, aims to prevent new and reduce existing disaster risk and requires all-of-society engagement and partnership.UNDRR — What is the Sendai Framework for Disaster Risk Reduction? ↗“The Sendai Framework was adopted on 18 March 2015. Its goal is to prevent new and reduce existing disaster risk . This requires an all-of-society engagement and partnership.”
  • PRS: the Disaster Management (Amendment) Bill, 2024 (passed by Lok Sabha on 12 December 2024 and Rajya Sabha on 25 March 2025) empowers states to constitute Urban Disaster Management Authorities for state capitals and municipal-corporation cities, chaired by the Municipal Commissioner.PRS Legislative Research — The Disaster Management (Amendment) Bill, 2024: bill summary and status ↗“The Bill empowers the state government to constitute a separate Urban Disaster Management Authority for state capitals and cities with a municipal corporation. The Urban Authority will comprise the Municipal Commissioner as the chairperson, the District Collector as the vice chairperson”

Question: UPSC's CS (Main) 2026, GS Paper III — paper ↗. Guidance: Minimalist IAS, checked 8 Nov 2026 (how we verify). ·

Model answer· 629words · Minimalist IAS

In the first hours of a disaster, rescue comes from neighbours, not agencies: communities are the first responders and the last line of recovery. The Sendai Framework (2015) therefore demands 'all-of-society engagement and partnership'; India's record shows why, and where that partnership still breaks.

Why community participation is the cornerstone: Indian examples

Local knowledgeFirst responseTrusted warningsOwnership ofmitigationInclusive recoveryVolunteer capacityCommunity at thecore

Community at the core: Local knowledge; First response; Trusted warnings; Ownership of mitigation; Inclusive recovery; Volunteer capacity

  • Local knowledge: residents know the terrain, the escape routes and the vulnerable households before any agency survey reaches them.
    • The Onge of the Andamans read the sea's retreat in 2004 and moved to high ground before the tsunami struck.
  • First response in the golden hour: agencies take hours to arrive; neighbours dig, lift and carry when minutes decide survival.
    • Kerala floods (2018): fishermen rescued thousands with their own boats before the Navy and NDRF could reach flooded villages.
  • Trusted warnings: an alert becomes an evacuation only when a known face explains it and a shelter is ready nearby.
    • Odisha's shelter committees and village volunteers moved lakhs before Phailin (2013) and Fani (2019); deaths fell sharply from the 1999 super cyclone.
  • Ownership of mitigation: embankments, mangroves and shelters last only when the people who use them maintain them, a Sendai priority.
    • Odisha's 'Tsunami Ready' villages: community-drawn plans, marked routes and regular drills, recognised by UNESCO-IOC.
  • Inclusive recovery: women's collectives know who lost what, so relief and rebuilding reach the last household, not the loudest.
    • Kudumbashree groups cleaned homes, counselled survivors and supported rebuilding after Kerala's 2018 floods.
  • Volunteer capacity as state policy: trained local volunteers multiply what the NDRF can do in 350-plus districts.
    • Aapda Mitra: one lakh volunteers trained in 350 districts; Yuva Aapda Mitra (2024-25): 2,37,326 NCC, NSS, NYKS and Scouts volunteers in 315 districts.

The full answer goes on to cover

  1. Challenges to community participation
  2. Measures to strengthen it: what a district officer can do

With 1 flowchart you can reproduce in the exam.

Read the full model answer (629 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 8 Nov 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

2025

GS Paper I 2025 · Q7

10 marks · 150 words X-Ray · Core #45

What are Tsunamis? How and where are they formed? What are their consequences? Explain with examples.

Approach · directive: “what / how / explain”

What it asks · Define tsunamis, explain their causes and the regions where they occur, and describe their effects, with examples.

It asks 4 things — answer each

  1. What: define tsunamis
  2. How: explain the triggers and mechanism by which tsunamis form
  3. Where: identify the zones where tsunamis form, including those threatening India
  4. Explain: their consequences, with examples

Open with · A tsunami is a train of very long sea waves set off when a large mass of ocean water is suddenly displaced; NCERT stresses that it is a wave generated by tremors, not an earthquake itself.

Cover

  • Formation flowchart: undersea quake at a subduction zone → sea floor displaced → water column pushed → fast, low waves → shoaling near shore.
  • NCERT: a tsunami follows only when the epicentre is under the sea and the magnitude is high enough.
  • 2004 Sumatra–Andaman earthquake (Mw 9.3): mainly vertical displacement of the seafloor (NDMA); other triggers: submarine landslides, volcanoes (Krakatoa 1883, Hunga Tonga 2022).
  • Where: Pacific Ring of Fire; Sunda trench (east coast) and Makran zone (west coast) threaten India.
  • Consequences: 10,749 dead and 5,640 missing in India in 2004; salinised farms, wrecked boats, damaged mangroves; Tohoku 2011 led to Fukushima.
  • Response: INCOIS early warning detects tsunamigenic quakes within 10 minutes; Tsunami Ready, mock drills, mangrove belts.

Close with · Tsunamis cannot be prevented, but the two hours the 2004 waves took to reach India's east coast are now enough warning, if alerts reach every fishing hamlet.

Add value (verified)

Question: UPSC's CS (Main) 2025, GS Paper I — paper ↗. Approach: Minimalist IAS, checked 16 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 218words · Minimalist IAS

A tsunami is a train of very long sea waves set off when ocean water is suddenly displaced; NCERT calls it a wave generated by tremors, not an earthquake itself.

How they are formed

Undersea quakesea floor displacedwater column liftedfast, low waves cross oceanwaves slow and pile up near shore
  1. Undersea quake
  2. sea floor displaced
  3. water column lifted
  4. fast, low waves cross ocean
  5. waves slow and pile up near shore
  • The trigger: only a strong quake with an undersea epicentre raises one (NCERT).
  • Case: the 2004 Sumatra–Andaman quake (Mw 9.3) acted mainly through vertical seafloor displacement (NDMA).
  • Other causes: submarine landslides and volcanic eruptions (Krakatoa 1883, Hunga Tonga 2022).

The full answer goes on to cover

  1. Where they form
  2. Consequences
  3. Reducing losses

Read the full model answer (218 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 16 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

2024

GS Paper III 2024 · Q16

15 marks · 250 words X-Ray · Core #30

What are asteroids? How real is the threat of them causing extinction of life? What strategies have been developed to prevent such a catastrophe?

Approach · directive: “what / how real”

What it asks · Define asteroids, assess the realistic risk of an extinction-level impact, and describe detection and deflection strategies.

It asks 3 things — answer each

  1. What are asteroids: definition, origin and near-Earth objects
  2. How real is the threat of an extinction-level impact: evidence, probability and a clear assessment
  3. What strategies have been developed to prevent such a catastrophe: detection, deflection and coordination

Open with · Asteroids are rocky or metallic remnants of the solar system's formation, most in the main belt between Mars and Jupiter; over 36,000 near-Earth asteroids have been discovered (NASA CNEOS, via the UN).

Cover

  • Near-Earth objects: NEOs within 0.05 AU of Earth's orbit and larger than about 140 m are potentially hazardous.
  • Evidence: Chicxulub about 66 million years ago; Tunguska, 30 June 1908; Chelyabinsk, 15 February 2013, a 20 m object never seen before entry.
  • Real risk: extinction-level impacts are very low-probability but irreversible; city-destroying impacts are likelier and less tracked.
  • Detection: sky surveys, NASA's Planetary Defense Coordination Office, ESA programmes, ISRO's NETRA.
  • Deflection: DART (2022) shortened Dimorphos' orbit by 32 minutes; ESA's Hera follows up; gravity tractor and nuclear options studied.
  • Coordination: IAWN and SMPAG (2014) under COPUOS; 30 June is International Asteroid Day; Apophis passes 32,000 km from Earth on 13 April 2029.

Close with · Planetary defence is the one natural disaster humanity can prevent in advance; detection, tested deflection and the IAWN–SMPAG system, rehearsed on Apophis in 2029, make an extinction risk a managed one.

Add value (verified)

  • The UN notes that near-Earth objects within 0.05 AU of Earth's orbit and larger than about 140 m are potentially catastrophic threats.United Nations — International Asteroid Day ↗“NEOs, that are closer than 0.05 astronomical units to Earth's orbit (about 7.5 million kilometers) and larger than about 140 meters in size, represent potentially catastrophic threats to our planet.”
  • NASA confirmed that DART's impact shortened Dimorphos' orbit around Didymos by 32 minutes (from 11 h 55 min to 11 h 23 min).NASA — NASA Confirms DART Mission Impact Changed Asteroid's Motion in Space (11 October 2022) ↗“the investigation team has confirmed the spacecraft's impact altered Dimorphos' orbit around Didymos by 32 minutes, shortening the 11 hour and 55-minute orbit to 11 hours and 23 minutes.”
  • Over 36,000 near-Earth asteroids have been discovered (NASA Center for NEO Studies, cited by the UN).United Nations — International Asteroid Day, 30 June ↗“According to NASA’s Center for NEO Studies, there are over 36,000 Near Earth Asteroids discovered”
  • The UN General Assembly declared 30 June International Asteroid Day, the anniversary of the Tunguska impact of 1908.United Nations — International Asteroid Day, 30 June ↗“declaring 30 June International Asteroid Day in order to "observe each year at the international level the anniversary of the Tunguska impact over Siberia, Russian Federation, on 30 June 1908”
  • IAWN and SMPAG were established in 2014 after COPUOS endorsement in 2013.United Nations — International Asteroid Day, 30 June ↗“the International Asteroid Warning Network (IAWN) and the Space Mission Planning Advisory Group (SMPAG) were established in 2014.”
  • Chelyabinsk, 15 February 2013: an approximately 20 m, 13,000-tonne, previously unknown near-Earth object entered the atmosphere over the city.ESA — Chelyabinsk asteroid (image and caption, 2017) ↗“an approximately 20 m-diameter, 13 000-tonne (and previously unknown) near-Earth object (NEO) entered Earth's atmosphere over the city of Chelyabinsk in Russia.”
  • Apophis will safely pass about 32,000 km from Earth on 13 April 2029.NASA Science — Asteroid Apophis ↗“Near-Earth asteroid Apophis is a potentially hazardous asteroid that will safely pass close to Earth on April 13, 2029. It will come about 20,000 miles (32,000 kilometers) from our planet’s surface”

Question: UPSC's CS (Main) 2024, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 365words · Minimalist IAS

Asteroids are rocky or metallic remnants of the solar system's formation, most orbiting in the main belt between Mars and Jupiter. More than 36,000 near-Earth asteroids have been discovered (NASA's Center for NEO Studies). A few of these cross Earth's path, which is why the question of extinction is asked at all.

What asteroids are

  • Size and type: from metres to hundreds of kilometres across; carbonaceous, silicate or metallic by composition.
  • Near-Earth objects: those passing within 0.05 AU of Earth's orbit and larger than about 140 m are classed potentially hazardous.

The full answer goes on to cover

  1. How real is the threat of extinction
  2. Strategies developed to prevent a catastrophe

With 1 flowchart you can reproduce in the exam.

Read the full model answer (365 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

GS Paper III 2024 · Q17

15 marks · 250 words X-Ray · Core #45

What is disaster resilience? How is it determined? Describe various elements of a resilience framework. Also mention the global targets of Sendai Framework for Disaster Risk Reduction (2015–2030).

Approach · directive: “what / describe / mention”

What it asks · Define disaster resilience, explain what determines it, outline a resilience framework, and list the Sendai targets.

It asks 4 things — answer each

  1. What is disaster resilience: a clear definition
  2. How it is determined: exposure, vulnerability, capacity and the indicators used
  3. Describe the elements of a resilience framework
  4. Mention the seven global targets of the Sendai Framework 2015–2030

Open with · UNDRR defines resilience as the ability of a system, community or society exposed to hazards to resist, absorb, accommodate, adapt to, transform and recover from a hazard's effects in a timely and efficient manner.

Cover

  • Determinants: hazard exposure, physical and social vulnerability, and coping capacity: income, infrastructure, institutions, social capital.
  • Measured through robustness, redundancy, resourcefulness and rapidity, and indicators of risk, preparedness, recovery time and losses avoided.
  • Framework elements follow Sendai's four priorities: understanding risk; risk governance; investment in reduction; preparedness and build back better.
  • India: DM Act 2005; the NDMP carries the PM's Ten-Point Agenda (AMCDRR 2016); the Coalition for Disaster Resilient Infrastructure (2019).
  • Sendai targets A–D (by 2030): reduce disaster mortality, affected people, economic loss relative to GDP, and damage to critical infrastructure.
  • Sendai targets E–G: more national and local DRR strategies (by 2020), more international cooperation, better early warning and risk information.

Close with · Resilience is built before the hazard arrives: Sendai's seven targets must become district outcomes, with every development sector made to imbibe disaster risk management as the Ten-Point Agenda asks.

Add value (verified)

  • The Sendai Framework sets seven global targets and four priorities for 2015–2030.UNDRR — What is the Sendai Framework for Disaster Risk Reduction? ↗“The Sendai Framework outlines seven global targets and four priorities to be achieved between 2015 and 2030.”
  • UNDRR definition of resilience under the Sendai Framework terminology.UNDRR — Sendai Framework Terminology: Resilience ↗“The ability of a system, community or society exposed to hazards to resist, absorb, accommodate, adapt to, transform and recover from the effects of a hazard in a timely and efficient manner, including through the preservation and restoration of its essential basic structures and functions through risk management.”
  • Sendai Priority 4: preparedness for effective response and to Build Back Better in recovery, rehabilitation and reconstruction.UNDRR — What is the Sendai Framework? ↗“Priority 4 Enhancing disaster preparedness for effective response and to “Build Back Better” in recovery, rehabilitation and reconstruction”
  • Sendai Priority 1: understanding disaster risk in all its dimensions.UNDRR — What is the Sendai Framework? ↗“Priority 1 Understanding disaster risk Disaster risk management should be based on an understanding of disaster risk in all its dimensions”
  • The PM's Ten-Point Agenda was set out at AMCDRR, New Delhi, November 2016, and incorporated in the National Disaster Management Plan.Department of Science and Technology — Prime Minister's Ten-Point Agenda for DRR (annexure) ↗“The Prime Minister, Shri Narendra Modi, enunciated a Ten-Point Agenda in his inaugural speech at the Asian Ministerial Conference on Disaster Risk Reduction 2016, held in New Delhi during November 2016 (AMCDRR), which has also been incorporated in the NDMP.”
  • Ten-Point Agenda: all development sectors must imbibe disaster risk management; risk coverage for all; women's leadership central.Department of Science and Technology — Prime Minister's Ten-Point Agenda for DRR (annexure) ↗“development sectors must imbibe the principles of disaster risk management 2. Risk coverage must include all, starting from poor households to SMEs to multi-national corporations to nation states 3. Women’s leadership and greater involvement should be central to disaster risk management”

Question: UPSC's CS (Main) 2024, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 368words · Minimalist IAS

Disaster resilience, in UNDRR's definition, is the ability of a system, community or society exposed to hazards to 'resist, absorb, accommodate, adapt to, transform and recover' from a hazard's effects in a timely and efficient manner, keeping its essential structures and functions. Resilience is thus a property built before the hazard arrives.

How disaster resilience is determined

  • Risk factors: hazard exposure, physical and social vulnerability (poor housing, poverty, gender, disability) and coping capacity: income, infrastructure, institutions and social capital.
  • System properties: robustness, redundancy, resourcefulness and rapidity.
  • Indicators: risk, preparedness, recovery time and losses avoided, tracked against Sendai's own measures of mortality, people affected, economic loss and infrastructure damage.

The full answer goes on to cover

  1. Elements of a resilience framework
  2. Global targets of the Sendai Framework (2015–2030)

With 1 diagram you can reproduce in the exam.

Read the full model answer (368 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

GS Paper III 2024 · Q18

15 marks · 250 words X-Ray · Core #5

Flooding in urban areas is an emerging climate-induced disaster. Discuss the causes of this disaster. Mention the features of two such major floods in the last two decades in India. Describe the policies and frameworks in India that aim at tackling such floods.

Approach · directive: “discuss / mention / describe”

What it asks · Explain why Indian cities flood, describe two major urban floods, and outline the policy frameworks against them.

It asks 3 things — answer each

  1. Discuss the causes of urban flooding: climate-induced and urban
  2. Mention the features of two major urban floods of the last two decades in India
  3. Describe the policies and frameworks in India that aim to tackle urban floods

Open with · Urban floods differ from riverine floods: intense rain on paved, encroached cities overwhelms drains within hours; after Mumbai 2005, NDMA was the first to treat urban flooding as a separate disaster.

Cover

  • Climate: more frequent extreme rainfall events and cyclonic rain; sea-level rise and tidal backflow in coastal cities.
  • Urban causes: encroached lakes and drains, impervious surfaces, drains that fail for poor maintenance, unplanned growth on floodplains (NDMA).
  • Mumbai (26 July 2005): 944 mm in 24 hours at Santa Cruz, choked Mithi river and drains, over 60% of the city inundated.
  • Chennai (December 2015): record north-east monsoon rain, encroachments, and release from Chembarambakkam tank without inflow forecasting; 289 lives, 23.25 lakh houses (CAG).
  • Frameworks: NDMA Guidelines on Management of Urban Flooding (2010); flood plans under the DM Act 2005.
  • Programmes: 15th FC's ₹2,500 crore NDMF for seven cities, AMRUT storm-water drains, Smart Cities, IFLOWS-Mumbai, Model Building Bye-laws 2016, lake restoration.

Close with · Cities must plan with water, not against it: restore wetlands, enforce floodplain zoning and design drains for tomorrow's rainfall, in the spirit of Sendai's Priority 4 to Build Back Better.

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Question: UPSC's CS (Main) 2024, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 368words · Minimalist IAS

Urban floods differ from riverine floods: intense rain on paved, encroached cities overwhelms drains within hours. Hyderabad (2000), Mumbai (2005), Surat (2006) and Kolkata (2007) flooded within one decade, and after Mumbai the NDMA, for the first time, treated urban flooding as a separate disaster.

Causes of this climate-induced disaster

  • Climate-induced: more frequent extreme rainfall and cyclonic rain; sea-level rise and tidal backflow that block drainage in coastal cities.
  • Encroachment: lakes, wetlands and natural drains built over; NDMA calls encroachments 'a major problem in many cities and towns'.
  • Run-off and drains: impervious surfaces raise run-off while drains designed for old rainfall norms fail further for poor maintenance and solid waste choking outfalls.
  • Governance: fragmented agencies, weak zoning enforcement and poor real-time rainfall data.

The full answer goes on to cover

  1. Features of two major floods
  2. Policies and frameworks that aim to tackle such floods

With 1 table you can reproduce in the exam.

Read the full model answer (368 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

2023

GS Paper III 2023 · Q7

10 marks · 150 words

Dam failures are always catastrophic, especially on the downstream side, resulting in a colossal loss of life and property. Analyze the various causes of dam failures. Give two examples of large dam failures.

Approach · directive: “analyse / give”

What it asks · Analyse the natural, technical and management causes behind dam failures and cite two large examples.

It asks 2 things — answer each

  1. Analyse the various causes of dam failures: hydrological, structural, ageing, external and operational
  2. Give two examples of large dam failures

Open with · India has 6,628 large dams, the world's third-largest stock, and about 26% are over 50 years old (PIB, 2026); a breach sends a flood wave downstream with almost no warning, so the valley below pays for every weakness above.

Cover

  • Hydrological: overtopping when inflow exceeds spillway capacity; climate change makes old design floods obsolete.
  • Structural and geotechnical: seepage and piping through embankment or foundation, weak rock, poor design or construction.
  • Ageing and neglect: 291 dams over 100 years old; deteriorated concrete, silted reservoirs, jammed gates, weak inspection.
  • External and operational: earthquakes, landslides into reservoirs, cascading failure; late gate operation, no emergency action plan.
  • Examples: Machchhu-II, Morbi (11 August 1979), overtopping; Teton, USA (5 June 1976), piping during first filling.
  • Way forward: Dam Safety Act 2021 (in force 30 December 2021), DRIP rehabilitation, Emergency Action Plans, real-time flood forecasting.

Close with · Dam safety is disaster prevention in its purest form: design margins, honest inspection and rehearsed warnings cost a fraction of the relief that follows a breach, which is what the Dam Safety Act 2021 must now deliver dam by dam.

Add value (verified)

Question: UPSC's CS (Main) 2023, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 223words · Minimalist IAS

India has 6,628 large dams, the world's third-largest stock, about 26% over 50 years old (PIB, 2026); a breach gives the valley below almost no warning.

Causes of dam failures

  • Hydrological: overtopping when inflow exceeds spillway capacity; climate-driven extreme rain makes old design floods obsolete.
  • Structural: seepage and internal erosion (piping) through embankment or foundation, weak rock, poor construction.
  • Ageing and neglect: 291 Indian dams are over 100 years old; worn concrete, silted reservoirs, jammed gates, weak inspection.
  • External triggers: earthquakes, reservoir landslides, cascading failure down a chain of dams.
  • Operational lapses: late gate operation, no emergency plan or downstream warning.
Trigger (flood, quake)weakness (age, silt)breachflood wavedownstream loss
  1. Trigger (flood, quake)
  2. weakness (age, silt)
  3. breach
  4. flood wave
  5. downstream loss

The full answer goes on to cover

  1. Two large dam failures
  2. Way forward

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2022

GS Paper III 2022 · Q8

10 marks · 150 words

Explain the mechanism and occurrence of cloudburst in the context of the Indian subcontinent. Discuss two recent examples.

Approach · directive: “explain / discuss”

What it asks · Explain how cloudbursts occur (moist air, orographic lifting, convection), where in the subcontinent they occur, and give two recent examples with impacts.

It asks 3 things — answer each

  1. Explain the mechanism of a cloudburst
  2. Explain its occurrence in the Indian subcontinent: where and when
  3. Discuss two recent examples and their impact

Open with · IMD terms a rain event a cloudburst when a station receives 10 cm of rain in one hour; over a few tens of square kilometres it turns, within minutes, into flash floods and debris flows.

Cover

  • Mechanism: warm, moist monsoon air forced up steep slopes (orographic lift) builds towering cumulonimbus clouds whose strong updrafts hold large droplets aloft.
  • Release: when the updraft collapses, or clouds are hemmed in by narrow valleys, the stored water falls at once; a western disturbance meeting the monsoon can intensify it.
  • Occurrence: mostly in the monsoon on mid-elevation slopes of the Himalayan belt (Uttarakhand, Himachal Pradesh, Jammu and Kashmir, Ladakh) and at times the Western Ghats; mountains are more prone because of orography.
  • Examples: Amarnath cave area, Jammu and Kashmir, 8 July 2022, flash floods through pilgrims' camps; Kishtwar, Jammu and Kashmir, 28 July 2021, deaths and destroyed houses.
  • Impact multipliers: deforestation, road-cutting and construction on fragile slopes and riverbeds turn heavy rain into flash floods, landslides and debris flows.
  • Response: IMD says cloudbursts are very hard to predict and need a dense radar network; six Doppler radars were added in 2022, including Surkanda Devi (Uttarakhand) and Banihal Top (J&K), taking the total to 35; nowcasting, hazard zoning and regulated construction.

Close with · Cloudbursts cannot be prevented; resilience lies in nowcasting, disciplined hill land use and communities that know when to move, the local test of the Sendai Framework on disaster risk reduction.

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  • IMD's working definition: 10 cm of rainfall at a station in one hour is a cloudburst; it is very difficult to predict because of its small scale, and nowcasting needs a dense radar network over prone areas; mountains are more prone because of orography.India Meteorological Department: Frequently Asked Questions on Monsoon, Q46 (What is cloud burst? Can it be predicted?) ↗“If 10 cm rainfall is received at a station in one hour, the rain event is termed as cloud burst. It is very difficult to predict the cloud bursts due to its very small scale in space and time.”
  • Ministry of Earth Sciences, 2022: six Doppler Weather Radars commissioned at Chennai, Leh, Ayanagar (Delhi), Mumbai, Surkanda Devi (Uttarakhand) and Banihal Top (J&K), taking the national total to 35.PIB (26 December 2022): Year-End Review 2022, Ministry of Earth Sciences ↗“Six Doppler Weather Radars (DWRs) have been commissioned at Chennai, Leh, Ayanagar (Delhi), Mumbai, Surkanda Devi (Uttarakhand) & Banihal Top (J&K) in 2022, taking the total number of DWRs to 35.”

Question: UPSC's CS (Main) 2022, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 224words · Minimalist IAS

IMD terms a rain event a cloudburst when a station receives 10 cm of rain in one hour; over a few tens of square kilometres it turns, within minutes, into flash floods and debris flows.

Mechanism of a cloudburst

  • Orographic lift: warm, moist monsoon air forced up steep slopes builds towering cumulonimbus clouds whose updrafts hold droplets aloft.
  • Sudden release: when the updraft collapses or narrow valleys hem the cloud in, the water falls at once; a western disturbance can intensify it.

The full answer goes on to cover

  1. Occurrence in the Indian subcontinent
  2. Two recent examples
  3. Way forward

With 1 map you can reproduce in the exam.

Read the full model answer (224 words) →

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GS Paper III 2022 · Q18

15 marks · 250 words X-Ray · Core #20

Explain the causes and effects of coastal erosion in India. What are the available coastal management techniques for combating the hazard ?

Approach · directive: “explain / what”

What it asks · Explain the natural and human causes of coastal erosion in India, its effects on people and ecosystems, and the hard, soft and policy tools available to manage it.

It asks 3 things — answer each

  1. Explain the causes of coastal erosion in India, natural and human
  2. Explain its effects on people and ecosystems
  3. What coastal management techniques are available to combat it: hard, soft and policy tools

Open with · Coastal erosion is the loss of shoreline to waves, currents and storms; NCCR found 33.6% of India's mainland coast eroding over 1990-2018, and the Government concedes it hits fishing communities (PIB, 2023).

Cover

  • Natural causes: wave action, longshore currents, storms and cyclones, sea-level rise, tides and loss of sediment supply.
  • Human causes: dams and sand mining that cut river sediment, ports and harbours that block sand drift, seawalls that shift erosion elsewhere, destruction of mangroves and dunes, and coastal construction.
  • Effects on people: loss of land, homes and livelihoods, especially of fishing communities, saltwater intrusion, damage to roads, ports and tourism, and displacement.
  • Effects on ecology: loss of beaches, mangroves and wetlands, damaged turtle habitats and greater flood and storm-surge risk.
  • Hard techniques: seawalls, groynes, breakwaters, revetments and offshore reefs; effective locally but costly and may move erosion down the coast.
  • Soft and policy measures: beach nourishment, mangrove and dune restoration, shelterbelts, Coastal Regulation Zone rules, shoreline mapping, integrated coastal zone management and managed retreat.

Close with · Working with natural buffers rather than against the sea, and planning settlements by the hazard line, is how India can meet the Sendai Framework's aim of fewer disaster losses and keep its coast habitable.

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Question: UPSC's CS (Main) 2022, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 365words · Minimalist IAS

Coastal erosion is the loss of shoreline to waves, currents and storms. The National Centre for Coastal Research found about a third of India's mainland coast, 33.6% over 1990-2018, eroding to varying degrees, and it hits coastal communities, fishermen most of all (PIB, 2023).

Causes of coastal erosion in India

  • Natural forces: wave action, longshore currents, storms and cyclones, tides and sea-level rise.
  • Sediment starvation: dams and river-sand mining cut the sand that rivers once delivered to the coast.
  • Structures on the shore: ports, harbours and breakwaters block the natural drift of sand, and seawalls shift erosion to the next stretch.
  • Lost buffers: destruction of mangroves and dunes, and construction on the beach itself.

The full answer goes on to cover

  1. Effects of coastal erosion
  2. Coastal management techniques to combat the hazard

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2021

GS Paper III 2021 · Q8

10 marks · 150 words X-Ray · Core #55

Discuss about the vulnerability of India to earthquake related hazards. Give examples including the salient features of major disasters caused by earthquakes in different parts of India during the last three decades.

Approach · directive: “discuss / give examples”

What it asks · Explain why India is highly exposed to earthquake hazards and give examples of major earthquakes of the last three decades with their salient features.

It asks 2 things — answer each

  1. Discuss India's vulnerability to earthquake-related hazards: tectonic setting, seismic zoning, human factors and secondary hazards
  2. Give examples of major earthquakes of the last three decades in different parts of India, with their salient features, and the preparedness they call for

Open with · 59% of India's land is earthquake-prone: 11% in zone V, 18% in zone IV, 30% in zone III (NIDM); exposure rises as towns outgrow codes.

Cover

  • Vulnerability: 59% of land earthquake-prone (NIDM); Indian plate pushing under Eurasia strains the Himalayan arc; Kachchh rift and peninsular faults also active.
  • BIS zone V covers parts of the Himalaya, the North-East, Kachchh and the Andaman and Nicobar Islands; non-engineered houses and weak code enforcement multiply risk.
  • Secondary hazards: landslides, liquefaction, tsunami (2004 Sumatra-Andaman earthquake, Mw 9.3, NDMA).
  • Examples: Uttarkashi 1991, Latur 1993, Chamoli 1999, Bhuj 2001 (over 13,000 dead, liquefaction, Ahmedabad collapses), Kashmir 2005, Sikkim 2011.
  • Way forward: BIS-code construction, retrofitting (AIIMS New Delhi and Bhuj hospitals first), seismic observatories up from 80 in 2014 to 168 (PIB 2025), NDRF drills.
  • Conclusion anchor: the Prime Minister's Ten-Point Agenda on DRR implements the Sendai Framework 2015 (PIB).

Close with · The Prime Minister's Ten-Point Agenda on DRR, India's route to the Sendai Framework 2015, makes risk reduction a development task: safety built into every house, not rescue after the shock.

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Question: UPSC's CS (Main) 2021, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 225words · Minimalist IAS

59% of India's land is earthquake-prone: 11% in zone V, 18% in zone IV, 30% in zone III (NIDM); exposure rises as towns outgrow codes.

Why India is vulnerable

  • Tectonics: the Indian plate's push under Eurasia strains the Himalayan arc; the Kachchh rift and peninsular faults also rupture.
  • Zoning: BIS zone V: parts of the Himalaya, the North-East, Kachchh, Andaman and Nicobar.
  • Human factors: non-engineered masonry, unplanned towns, weak code enforcement and low awareness turn tremors into disasters.
  • Secondary hazards: landslides, liquefaction and tsunami (2004 Sumatra-Andaman quake, Mw 9.3).

The full answer goes on to cover

  1. Major earthquakes of the last three decades
  2. Way forward

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GS Paper III 2021 · Q18

15 marks · 250 words

Describe the various causes and the effects of landslides. Mention the important components of the National Landslide Risk Management Strategy.

Approach · directive: “describe / mention”

What it asks · Describe the natural and human causes and the effects of landslides, and list the important components of the National Landslide Risk Management Strategy.

It asks 3 things — answer each

  1. Describe the causes of landslides: natural and human
  2. Describe the effects of landslides
  3. Mention the important components of the National Landslide Risk Management Strategy (NDMA, 2019), and the way forward

Open with · The Geological Survey of India puts 12.6% of India's land area (0.42 million sq km, excluding snow cover) at landslide risk, from the Himalaya to the Western Ghats; Wayanad's Mundakkai-Chooralmala slide of 30 July 2024 showed how rain on a fragile slope becomes a disaster.

Cover

  • Natural causes: steep slopes, weak rock, heavy rain, cloudbursts, earthquakes, snowmelt and river undercutting; NCERT: the Himalaya are tectonically active, largely sedimentary and unconsolidated.
  • Human causes: deforestation, unplanned road-cutting and construction, mining and quarrying, blocked drainage, shifting cultivation.
  • Effects: deaths and destroyed homes and farms; landslide dams and flash floods; cut-off villages, lost tourism, relief costs; repeated losses in Uttarakhand, Himachal, Sikkim, Kerala, the North-East and the Nilgiris.
  • Exposure (GSI): 0.18 million sq km in the North-East Himalaya, 0.14 in the North-West Himalaya, 0.09 in the Western Ghats and Konkan; NCERT's very high vulnerability zone adds the Nilgiris and Andaman and Nicobar.
  • NLRMS (NDMA, 2019): hazard mapping, monitoring and early warning, awareness, capacity building and training, regulation and policy with mountain-zone rules, stabilisation and mitigation, a proposed Centre for Landslide Management.
  • Way forward: retaining walls, drainage and bio-engineering, no-construction zones, afforestation, regulated roads and hydropower; local warning, village task forces, NDRF and SDRF.

Close with · Landslides cannot be eliminated, but hazard maps that reach land-use plans and warnings that reach the last village can cut losses, the risk-reduction path the Sendai Framework 2015-2030 sets.

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  • The Geological Survey of India estimates that about 12.6% of India's land area, excluding snow-covered area, is prone to landslide hazard, mostly in the North-East Himalaya, North-West Himalaya and Western Ghats.Landslide Hazard, Bhusanket portal, Geological Survey of India ↗“In India, about 0.42 million sq. km or 12.6% of land area, excluding snow covered area, is prone to landslide hazard. Out of this, 0.18 million sq. km falls in North East Himalaya, including Darjeeling and Sikkim Himalaya”
  • GSI's regional breakdown of landslide-prone area: 0.18 million sq km in the North-East Himalaya (including Darjeeling and Sikkim), 0.14 in the North-West Himalaya, 0.09 in the Western Ghats and Konkan hills, 0.01 in the Eastern Ghats (Araku).Geological Survey of India, Bhusanket: Landslide hazard in India ↗“0.18 million sq. km falls in North East Himalaya, including Darjeeling and Sikkim Himalaya; 0.14 million sq. km falls in North West Himalaya (Uttarakhand, Himachal Pradesh and Jammu & Kashmir); 0.09 million sq. km in Western Ghats and Konkan hills (Tamil Nadu, Kerala, Karnataka, Goa and Maharashtra) and 0.01 million sq. km in Eastern Ghats of Aruku area in Andhra Pradesh”
  • The Wayanad landslide struck Chooralmala and Mundakkai on 30 July 2024; the Southern Naval Command sent relief teams at the Kerala SDMA's request.PIB, Ministry of Defence (31 July 2024): Southern Naval Command joins relief operations at Wayanad landslide ↗“A major landslide hit Chooralmala and Mundakkai areas of Wayanad district of Kerala on 30 Jul 24.”
  • The Sendai Framework for Disaster Risk Reduction 2015-2030 was the first major agreement of the post-2015 development agenda.UNDRR: What is the Sendai Framework for Disaster Risk Reduction? ↗“The Sendai Framework for Disaster Risk Reduction 2015-2030 (Sendai Framework) was the first major agreement of the post-2015 development agenda”

Question: UPSC's CS (Main) 2021, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 362words · Minimalist IAS

The Geological Survey of India puts 12.6% of India's land area, 0.42 million sq km excluding snow cover, at landslide risk, from the North-East and North-West Himalaya to the Western Ghats. Wayanad's Mundakkai-Chooralmala slide of 30 July 2024 showed how rain on a fragile slope becomes a disaster.

Causes of landslides

  • Natural: steep slopes, weak or fractured rock, heavy and prolonged rain, cloudbursts, earthquakes, snowmelt and rivers undercutting slope toes; NCERT notes that the Himalaya are tectonically active and built largely of sedimentary and unconsolidated material.
  • Human: deforestation, unplanned road-cutting and construction on slopes, mining and quarrying, blocked drainage and shifting cultivation turn a hazard into a disaster.

The full answer goes on to cover

  1. Effects of landslides
  2. Important components of the National Landslide Risk Management Strategy (NDMA, 2019)
  3. Way forward

With 1 map you can reproduce in the exam.

Read the full model answer (362 words) →

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2020

GS Paper III 2020 · Q18

15 marks · 250 words

Discuss the recent measures initiated in disaster management by the Government of India departing from the earlier reactive approach.

Approach · directive: “discuss”

What it asks · Show how India has moved from relief-centred response to prevention, mitigation and preparedness, with recent measures.

It asks 2 things — answer each

  1. Establish the shift: from a relief-centred, reactive approach to risk reduction across the disaster cycle
  2. Discuss the recent measures that embody the shift: planning, agenda, early warning, resilient infrastructure, funding and community capacity, and the gaps that remain

Open with · The 1999 Odisha super cyclone killed about 10,000 people; Cyclone Fani in 2019, by the Home Minister's account to Parliament, one. That contrast captures India's shift from relief after the event to managing risk before it, which the Disaster Management Act, 2005 began and recent measures have deepened.

Cover

  • Shift: the 2005 Act created the NDMA, SDMAs and DDMAs and the full cycle of prevention, mitigation, preparedness, response and recovery; the NDMP (2016, revised 2019) is aligned with the Sendai Framework.
  • Ten-Point Agenda (2016): risk reduction in every development sector, risk cover for all, women's leadership, risk mapping, technology.
  • Early warning: IMD, INCOIS and CWC forecasts pushed through a Common Alerting Protocol-based alert system covering all 36 States and UTs; CDRI launched by India in 2019; National Cyclone Risk Mitigation Project.
  • Funding: the 15th Finance Commission earmarked 20% of disaster grants for national and State mitigation funds and 80% for response, within Rs 1,60,153 crore for States over 2021-26.
  • Community: Aapda Mitra's 1,00,000 trained volunteers in 350 districts, NDRF drills, school and hospital safety; gaps in local capacity, building-code enforcement and risk data.

Close with · Measuring success in lives not lost per event, and funding prevention as generously as relief, is how India meets the Sendai Framework's 2030 goals and makes 'zero casualty' the norm rather than the exception.

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Question: UPSC's CS (Main) 2020, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 348words · Minimalist IAS

The 1999 Odisha super cyclone killed about 10,000 people; Cyclone Fani in 2019, by the Home Minister's account to Parliament, one. That contrast captures India's shift from relief after the event to managing risk before it, which the Disaster Management Act, 2005 began and recent measures have deepened.

From a reactive to a risk-reduction approach

  • Legal spine: the 2005 Act created the NDMA, SDMAs and DDMAs and defined the full cycle of prevention, mitigation, preparedness, response and recovery.
  • Global alignment: the National Disaster Management Plan (2016, revised 2019) is aligned with the Sendai Framework and seeks coherence with the SDGs and the Paris Agreement.
2005DM Act2016NDMP and PM'sTen-Point Agenda2019CDRI launched2021-2615th FC mitigationfunds
  1. 2005: DM Act
  2. 2016: NDMP and PM's Ten-Point Agenda
  3. 2019: CDRI launched
  4. 2021-26: 15th FC mitigation funds

The full answer goes on to cover

  1. Recent measures that embody the shift
  2. Gaps that remain

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2019

GS Paper III 2019 · Q8

10 marks · 150 words X-Ray · Core #45

Vulnerability is an essential element for defining disaster impacts and its threat to people. How and in what ways can vulnerability to disasters be characterized? Discuss different types of vulnerability with reference to disasters.

Approach · directive: “how / discuss”

What it asks · Define vulnerability, show how it is characterised (exposure, susceptibility, coping capacity) and discuss its types (physical, social, economic, environmental, institutional) with disaster examples.

It asks 2 things — answer each

  1. How vulnerability to disasters is characterised: exposure, susceptibility and coping capacity
  2. Discuss the types of vulnerability (physical, social, economic, environmental, institutional) with disaster examples

Open with · The 1999 super cyclone killed about 10,000 people in Odisha, while Cyclone Fani in 2019 killed one (MHA, 2025): the hazard was similar, the vulnerability was not; UNDRR defines vulnerability as the physical, social, economic and environmental conditions that increase susceptibility to a hazard.

Cover

  • Risk equation: risk rises with hazard, exposure and vulnerability and falls with coping capacity.
  • Three lenses: exposure (who and what sits in harm's way), susceptibility (housing, health, income) and resilience (assets, insurance, institutions); it varies within one village.
  • India's profile: 58.6% of landmass earthquake-prone, 12% flood-prone, 5,700 of 7,516 km of coast cyclone-prone, 68% of cultivable area drought-prone (NIDM).
  • Physical: weak masonry, homes on floodplains, coasts, slopes and seismic zones; mapped in BMTPC's Vulnerability Atlas of India.
  • Social and economic: poverty, gender, age, disability, caste, low awareness; one rainfed crop or one boat with no savings or insurance.
  • Environmental: lost mangroves, wetlands and forests that once absorbed surges, floods and slides.
  • Institutional and attitudinal: weak warning, lax code enforcement, fatalism; Odisha's shelters, drills and IMD warnings show these can be cut.

Close with · Hazards cannot be abolished but vulnerability can: the Sendai Framework (2015-2030) seeks the substantial reduction of disaster risk and losses in lives, livelihoods and health, and that is the real business of disaster management.

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  • UNDRR's official definition ties vulnerability to physical, social, economic and environmental factors, a ready framework for classifying its types.Terminology on Disaster Risk Reduction: Vulnerability, UN Office for Disaster Risk Reduction (UNDRR) ↗“The conditions determined by physical, social, economic and environmental factors or processes which increase the susceptibility of an individual, a community, assets or systems to the impacts of hazards.”
  • NIDM (vulnerability profile of India): 58.6 per cent of the landmass is prone to moderate to very high intensity earthquakes, 12 per cent of land to floods and river erosion, close to 5,700 of 7,516 km of coastline to cyclones and tsunamis, and 68 per cent of cultivable area to drought.NIDM: Do's and Don'ts booklet, Vulnerability Profile of India ↗“Almost 58.6 percent of the landmass is prone to earthquakes of moderate to very high intensity; over 40 million hectares (12 per cent of land) are prone to floods and river erosion; of the 7,516 km long coastline, close to 5,700 km is prone to cyclones and tsunamis; 68 per cent of the cultivable area is vulnerable to drought”
  • PIB (MHA, June 2025): the 1999 super cyclone killed 10,000 people in Odisha, whereas Cyclone Fani in 2019 killed one.PIB: Union Home Minister addresses the Annual Conference of Relief Commissioners (2025) ↗“in 1999, a super cyclone hit Odisha in which 10,000 people lost their lives, whereas in 2019, during Cyclone Fani in Odisha, only one person died.”
  • UNDRR: the Sendai Framework (2015-2030) advocates the substantial reduction of disaster risk and losses in lives, livelihoods and health and in economic, physical, social, cultural and environmental assets.UNDRR: What is the Sendai Framework for Disaster Risk Reduction? ↗“the Sendai Framework advocates for: The substantial reduction of disaster risk and losses in lives, livelihoods and health and in the economic, physical, social, cultural and environmental assets of persons, businesses, communities and countries.”

Question: UPSC's CS (Main) 2019, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 225words · Minimalist IAS

The 1999 super cyclone killed about 10,000 people in Odisha; Cyclone Fani in 2019 killed one (MHA). The hazard was similar, the vulnerability was not. UNDRR defines it by the physical, social, economic and environmental conditions that raise susceptibility to a hazard.

How vulnerability to disasters is characterised

  • Risk equation: risk rises with hazard, exposure and vulnerability, and falls with coping capacity.
  • Three lenses: exposure (what sits in harm's way), susceptibility (housing, health, income) and resilience (assets, insurance, institutions).
  • India's profile: 58.6% of landmass earthquake-prone, 12% flood-prone, 5,700 of 7,516 km of coast cyclone-prone, 68% of cultivable area drought-prone (NIDM).

The full answer goes on to cover

  1. Types of vulnerability with reference to disasters

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GS Paper III 2019 · Q18

15 marks · 250 words X-Ray · Core #45

Disaster preparedness is the first step in any disaster management process. Explain how hazard zonation mapping will help disaster mitigation in the case of landslides.

Approach · directive: “explain how”

What it asks · Explain how landslide hazard zonation, which grades terrain by relative hazard, supports mitigation through land-use planning, safe siting, engineering, warning and preparedness.

It asks 3 things — answer each

  1. Explain landslide hazard zonation and its place in preparedness
  2. Explain how zonation helps mitigation: land-use planning, infrastructure, prioritising works, early warning, awareness and law
  3. Note its limits

Open with · On 30 July 2024 multiple landslides struck Wayanad in Kerala and Army rescue columns were requisitioned within hours; preparedness that begins at rescue is too late, it begins with knowing where slopes can fail, which is what landslide hazard zonation maps.

Cover

  • Zonation: terrain graded from very low to very high hazard using slope, geology, drainage, land use, rainfall and past slides.
  • National baseline: GSI's susceptibility mapping at 1:50,000 covers about 4.3 lakh sq km in 19 States/UTs; NDMA's 2019 strategy makes mapping its first component.
  • Mitigation uses: land-use control, safer alignments and slope engineering, priority funding for high-hazard zones with people at risk.
  • Early warning: maps anchor rainfall thresholds; GSI's Landslide Early Warning System issued forecast bulletins for 21 districts in eight States in 2025.
  • Awareness: maps free on GSI's Bhusanket portal and Bhooskhalan app; can back building codes and insurance.
  • Limits and way forward: maps are static and scale-dependent; GSI's 1:10,000 mapping of 200 critical sectors by 2028 must enter building bye-laws.

Close with · Zonation is the Sendai Framework's first priority, understanding disaster risk, made local: it shows where not to build, where to protect and whom to warn, and saves lives only when updated and enforced.

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  • Multiple landslides struck Wayanad, Kerala, on 30 July 2024; the Army deployed six HADR columns on the civil administration's requisition that morning.PIB (Ministry of Defence), 31 Jul 2024 — Indian Army intensifies rescue operation in areas affected by landslide in Wayanad ↗“the Indian Army has intensified its efforts to rescue people stranded after multiple devastating landslides struck Wayanad in Kerala on 30 th July 2024.”
  • GSI completed National Landslide Susceptibility Mapping at 1:50,000 for all landslide-prone hilly areas (Himalaya, North-East Tertiary belt, Western Ghats), about 4.3 lakh sq km in 19 States/UTs, zoned high, moderate and low.PIB (Ministry of Mines), Aug 2025 — Parliament question on landslide susceptibility mapping ↗“including the Himalayan region, the Tertiary Belt of North-eastern India and Western Ghats, spreading over parts of 19 states/ UTs covering an area of about 4.3 lakh sq. km. areas. The landslide susceptibility maps show the total area classified into high, moderate and low zones”
  • GSI's prototype regional Landslide Early Warning System has issued forecast bulletins for 21 districts in eight States since the 2025 monsoon.PIB (Ministry of Mines), Aug 2025 — Parliament question on landslide susceptibility mapping ↗“GSI, as part of the multi consortium LANDSLIP project, developed a prototype regional Landslide Early Warning System (LEWS) for India. Since 2025 monsoon, GSI has been providing operational and experimental landslide forecast bulletins for 21 districts in eight states.”
  • Susceptibility maps are free on GSI's Bhusanket portal and Bhooskhalan app; GSI is upscaling to 1:10,000 mapping of 200 critical sectors by 2028.PIB (Ministry of Mines), Aug 2025 — Parliament question on landslide susceptibility mapping ↗“This is also available for viewing in GSI’s Bhusanket portal as well as Bhooskhalan mobile app. Building on the NLSM baseline, GSI has upscaled into meso-scale (1:10,000/1:5,000) landslide susceptibility mapping. This initiative focuses on completing 200 critical sectors identified through NLSM and state government consultations by 2028.”
  • Sendai Framework Priority 1 is 'Understanding disaster risk'.UNDRR — What is the Sendai Framework for Disaster Risk Reduction? ↗“Priority 1 Understanding disaster risk Disaster risk management should be based on an understanding of disaster risk in all its dimensions of vulnerability, capacity, exposure of persons and assets, hazard characteristics and the environment.”

Question: UPSC's CS (Main) 2019, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 368words · Minimalist IAS

On 30 July 2024 multiple landslides struck Wayanad in Kerala, and Army rescue columns were requisitioned within hours. Preparedness that begins at rescue is too late; it begins with knowing where slopes can fail, which is what landslide hazard zonation maps.

What landslide hazard zonation gives

  • Graded terrain: classes from very low to very high hazard, built from slope, geology, drainage, land use, rainfall and past slides.
  • A national baseline: GSI's National Landslide Susceptibility Mapping at 1:50,000 covers about 4.3 lakh sq km in 19 States/UTs across the Himalaya, the North-East and the Western Ghats, zoned high, moderate and low; NDMA's 2019 strategy makes such mapping its first component.

✏️ Map to sketch in the exam · Landslide-prone belts mapped by GSI

  • Shade: Jammu and Kashmir, Ladakh, Himachal Pradesh, Uttarakhand, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Meghalaya, Tripura, Assam = Himalayan and North-Eastern States
  • Shade: Maharashtra, Goa, Karnataka, Kerala, Tamil Nadu = Western Ghats States
  • Mark: Joshimath (30.56, 79.57), Wayanad (11.50, 76.15)
  • Legend: Joshimath 2023, Wayanad 2024

Draw on India's official outline (Survey of India boundary).

The full answer goes on to cover

  1. How zonation helps disaster mitigation
  2. Limits and way forward

Read the full model answer (368 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

2018

GS Paper III 2018 · Q18

15 marks · 250 words

Describe various measures taken in India for Disaster Risk Reduction (DRR) before and after signing ‘Sendai Framework for DRR (2015–2030)’. How is this framework different from ‘Hyogo Framework for Action, 2005’?

Approach · directive: “describe / how”

What it asks · List India's DRR measures before and after Sendai (2015), then contrast the Sendai Framework with the Hyogo Framework.

It asks 3 things — answer each

  1. Describe DRR measures taken in India before the Sendai Framework (2015)
  2. Describe DRR measures taken after signing the Sendai Framework, including the Ten-Point Agenda and mitigation financing
  3. How the Sendai Framework differs from the Hyogo Framework for Action, 2005

Open with · The 1999 Odisha super cyclone killed 9,658 people; Cyclone Fani in May 2019, under a 'zero casualty' policy, saw a record 1.2 million people evacuated; that distance was travelled across the Hyogo Framework (2005-2015) and the Sendai Framework (2015-2030).

Cover

  • Before Sendai: the Disaster Management Act, 2005 created the National, State and District Disaster Management Authorities; the National Disaster Response Force followed in 2006, and the National Policy on Disaster Management in 2009.
  • Also before: NDMA guidelines for cyclones, earthquakes and floods, cyclone shelters and forecasting, the tsunami early-warning system (INCOIS, 2007), building codes and mock drills.
  • After Sendai: the National Disaster Management Plan, 2016, India's first national plan, aligned with Sendai; the Prime Minister's ten-point agenda (2016); India hosted the 2016 Asian Ministerial Conference on DRR.
  • Sendai's design: four priorities (understanding risk, stronger risk governance, investing in resilience, better preparedness with 'build back better') and seven global targets, agreed at Sendai in March 2015.
  • Difference: Hyogo had five priorities but no measurable global targets and centred on natural hazards and building resilience; Sendai adds targets and indicators and aims to prevent new risk and reduce existing risk.
  • Further shifts: from managing disasters to managing risk, stronger governance and accountability, all-of-society partnership, and a wider hazard scope covering natural and man-made hazards, including biological ones.
  • Gaps in India: uneven State capacity, weak urban planning and building-code enforcement, thin local funds, and mitigation and insurance lagging behind response.

Close with · Sendai's goal 'to prevent new and reduce existing disaster risk' through 'all-of-society engagement' is India's own test: resilient infrastructure, mitigation money spent, and local capacity of the kind that saved Odisha.

Add value (verified)

  • UNDRR summarises the Framework: adopted on 18 March 2015, its goal is to prevent new and reduce existing disaster risk through all-of-society partnership, and it works towards seven targets.What is the Sendai Framework for Disaster Risk Reduction?, United Nations Office for Disaster Risk Reduction (UNDRR) ↗“The Sendai Framework was adopted on 18 March 2015. Its goal is to prevent new and reduce existing disaster risk. This requires an all-of-society engagement and partnership. Everyone involved in the agreement is working towards 7 targets.”
  • The Hyogo Framework's five priorities for action (2005-2015): make DRR a national and local priority; identify, assess and monitor risks and enhance early warning; use knowledge, innovation and education; reduce underlying risk factors; strengthen preparedness for effective response.UNISDR: Hyogo Framework for Action 2005-2015, Building the Resilience of Nations and Communities to Disasters (contents, Priorities for action) ↗“3. Use knowledge, innovation and education to build a culture of safety and resilience at all levels ...................................................... 18 4. Reduce the underlying risk factors .................................................. 19 5. Strengthen disaster preparedness for effective response at all levels”
  • UNDRR: the Sendai Framework sets seven global targets and four priorities for 2015-2030, measured through 38 global indicators.UNDRR: What is the Sendai Framework for Disaster Risk Reduction? ↗“The Sendai Framework outlines seven global targets and four priorities to be achieved between 2015 and 2030.”
  • The Prime Minister's Ten-Point Agenda for DRR was set out at the Asian Ministerial Conference on Disaster Risk Reduction, New Delhi, November 2016, and incorporated in the National Disaster Management Plan.Department of Science and Technology: Annexure II, details of the Ten-Point Agenda ↗“The Prime Minister, Shri Narendra Modi, enunciated a Ten-Point Agenda in his inaugural speech at the Asian Ministerial Conference on Disaster Risk Reduction 2016, held in New Delhi during November 2016 (AMCDRR), which has also been incorporated in the NDMP.”
  • 15th Finance Commission award (2021-22 to 2025-26): Rs 1,28,122.40 crore in SDRF, Rs 32,030.60 crore in the State Disaster Mitigation Fund, Rs 54,770 crore in NDRF and Rs 13,693 crore in the National Disaster Mitigation Fund (MHA reply in Rajya Sabha, 2023).PIB: Increased allocation of funds under NDRF/SDRF (Ministry of Home Affairs, Rajya Sabha reply) ↗“an amount of Rs. 32,030.60 crore has been allocated under the State Disaster Mitigation Fund (SDMF) for the Award Period of 2021-22 to 2025-2026. Similarly, a total corpus of Rs. 54,770 crore has been allocated by the 15 th Finance Commission under National Disaster Response Fund (NDRF) and Rs. 13,693 crore under National Disaster Miti”
  • PreventionWeb (UNDRR): the 1999 Odisha cyclone killed 9,658 people; for Cyclone Fani (2019) the 'zero casualty' policy and accurate IMD warnings led to a record 1.2 million people being evacuated.PreventionWeb (UNDRR): India's Cyclone Fani recovery offers the world lessons in disaster preparedness ↗“The government’s “zero casualty” policy for natural disasters and the near accuracy of the India meteorological department’s early warning system have helped reduce the possibility of deaths from cyclone Fani. A record 1.2m people”

Question: UPSC's CS (Main) 2018, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 348words · Minimalist IAS

The 1999 Odisha super cyclone killed 9,658 people; Cyclone Fani in May 2019, under a 'zero casualty' policy, saw a record 1.2 million people evacuated in advance. That distance was travelled across two global frameworks: the Hyogo Framework for Action (2005-2015) and the Sendai Framework (2015-2030).

DRR measures before the Sendai Framework

  • Law and institutions: the Disaster Management Act, 2005 created the National, State and District Disaster Management Authorities; the National Disaster Response Force followed in 2006 and the National Policy on Disaster Management in 2009.
  • Hazard-specific action: NDMA guidelines for cyclones, earthquakes and floods, cyclone shelters and better forecasting, the tsunami early-warning system at INCOIS (2007), building codes and mock drills.

The full answer goes on to cover

  1. DRR measures after signing Sendai
  2. How Sendai differs from Hyogo

With 1 table you can reproduce in the exam.

Read the full model answer (348 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

2017

GS Paper III 2017 · Q17

15 marks · 250 words X-Ray · Core #20

‘Climate change’ is a global problem. How India will be affected by climate change ? How Himalayan and coastal states of India will be affected by climate change ?

Approach · directive: “how will India be affected”

What it asks · Describe the national impacts of climate change on India and then the specific risks to the Himalayan and coastal states.

It asks 3 things — answer each

  1. Explain how India as a whole will be affected by climate change
  2. Explain how the Himalayan states will be affected
  3. Explain how the coastal states will be affected

Open with · India's average temperature rose about 0.7°C over 1901-2018 and the North Indian Ocean rose 3.3 mm a year during 1993-2017 (MoES assessment, 2020); a monsoon-fed economy, a 7,500 km coast and a glaciated Himalaya turn these national numbers into local emergencies.

Cover

  • National: erratic monsoon, heat waves and extreme rain reduce crop yields and raise water stress, hitting farmers and food security.
  • National: health burdens from heat and disease, damage to infrastructure, biodiversity loss and economic cost from disasters.
  • Himalaya: glacier retreat first swells and then reduces river flow, affecting the Ganga-Brahmaputra basins and hydropower.
  • Himalaya: glacial lake floods, landslides, cloudbursts and forest fires threaten people, roads and tourism; apple and other horticulture zones shift uphill.
  • Coast: sea-level rise, coastal erosion and salinity ingress harm delta areas such as the Sundarbans and low-lying farmland.
  • Coast: stronger cyclones and storm surges endanger Odisha, Andhra Pradesh, Tamil Nadu, Gujarat and coastal cities; fisheries and mangroves decline.
  • Response: the National Action Plan on Climate Change (2008), State action plans, early warning, climate-smart farming and India's 2015 pledge under the Paris Agreement.

Close with · Mitigation decides how much warming the world gets and adaptation how many Indians it hurts; pursuing both, from the updated NDC under the Paris Agreement to district action plans, keeps the Himalaya and the coast habitable.

Add value (verified)

Question: UPSC's CS (Main) 2017, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 380words · Minimalist IAS

India's average temperature has risen by about 0.7°C over 1901-2018, and the North Indian Ocean rose 3.3 mm a year during 1993-2017 (MoES assessment, 2020). A monsoon-fed economy, a 7,500 km coast and a glaciated Himalaya make these national numbers local emergencies.

How India as a whole will be affected

  • Monsoon and farming: erratic rain in heavier bursts, floods and droughts in one year; heat at grain filling hurts wheat and rain-fed kharif suffers.
  • Water and health: stressed rivers and aquifers sharpen conflict; heat waves, malaria and dengue spread; outdoor workers lose productivity.
  • Economy and ecology: damaged infrastructure, higher cooling demand, coral bleaching; the poor can adapt least.

The full answer goes on to cover

  1. How Himalayan states will be affected
  2. How coastal states will be affected
  3. Way forward

With 1 map you can reproduce in the exam.

Read the full model answer (380 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

GS Paper III 2017 · Q18

15 marks · 250 words X-Ray · Core #20

On December 2004, tsunami brought havoc on fourteen countries including India. Discuss the factors responsible for occurrence of tsunami and its effects on life and economy. In the light of guidelines of NDMA (2010) describe the mechanisms for preparedness to reduce the risk during such events.

Approach · directive: “discuss / describe”

What it asks · Explain what causes tsunamis, describe the 2004 impacts on people and the economy, and set out preparedness measures in line with NDMA's 2010 tsunami guidelines.

It asks 3 things — answer each

  1. Discuss the factors responsible for the occurrence of a tsunami
  2. Discuss the 2004 tsunami's effects on life and the economy
  3. Describe the mechanisms of preparedness to reduce risk, in the light of the NDMA guidelines (2010)

Open with · On 26 December 2004 a Mw 9.3 Sumatra-Andaman earthquake displaced the seafloor and sent a tsunami across fourteen countries; in India 10,749 people died and 5,640 went missing (NDMA Guidelines, 2010), with no warning system in place.

Cover

  • Causes: mostly undersea earthquakes at subduction zones where one plate is thrust under another; also underwater landslides, volcanic eruptions and, rarely, meteorite impact.
  • Amplification: shallow coasts, funnel-shaped bays and the loss of mangroves and coastal dunes raise wave height on landing.
  • Effects on life: over ten thousand died in India, mostly in Tamil Nadu, the Andaman and Nicobar Islands, Andhra Pradesh, Kerala and Puducherry; many lost their homes.
  • Effects on the economy: fishing boats, ports, homes, roads and farmland were destroyed, and salt water damaged soil; livelihoods took years to recover.
  • Preparedness (warning): a tsunami early warning system with seismic and sea-level sensors and quick alerts to coasts, run by INCOIS Hyderabad.
  • Preparedness (risk reduction): hazard and vulnerability mapping, coastal land-use control, bio-shields such as mangroves, safe structures, evacuation shelters and routes.
  • Preparedness (community): public awareness, mock drills, trained responders, clear roles for agencies, and coordination through the National and State Disaster Management Authorities.

Close with · India now has the sensors it lacked in 2004; warnings become lives saved only when every exposed village earns UNESCO-IOC 'Tsunami Ready' recognition, which INCOIS now runs along India's coast.

Add value (verified)

  • NDMA Guidelines on Management of Tsunamis (2010): in India 10,749 people lost their lives and 5,640 were missing in the 2004 tsunami.National Disaster Management Guidelines: Management of Tsunamis, NDMA, August 2010 (hosted by NIDM) ↗“In India 10,749 people lost their lives due to the tsunami and 5,640 people were missing in the Tsunami- affected areas.”
  • NDMA Guidelines (2010): mock drills to be organised in each coastal district by the DDMA to assess deficiencies in response.National Disaster Management Guidelines: Management of Tsunamis, NDMA, August 2010 (hosted by NIDM) ↗“ll be organised in each coastal district by the concerned DDMA and the deficiencies in response, if any, will be assessed through mock drills.”
  • NDMA on tsunami guidelines: a techno-legal regime through land-use practices, bioshields, shelter-belt plantation and mangrove regeneration with community involvement.NDMA: Tsunami (Natural Hazards page) ↗“recommends a robust techno-legal regime through efficient land use practices, bioshields, shelter belt plantation and mangrove regeneration with community involvement.”
  • Indian Tsunami Early Warning System: 17 broadband seismic stations, 4 bottom pressure recorders, 25 tide gauges and a 24x7 warning centre.PIB: Working of Tsunami Warning System (Ministry of Earth Sciences) ↗“real-time seismic monitoring network of 17 broadband seismic stations to detect tsunamigenic earthquakes, a network of real-time sea-level sensors with 4 Bottom Pressure Recorders (BPR) in the open ocean and 25 tide gauge stations”
  • INCOIS: the Indian Tsunami Early Warning Centre was set up at INCOIS, Hyderabad in response to the 2004 tsunami; INCOIS runs the UNESCO-IOC Tsunami Ready programme in India.INCOIS: Information on UNESCO-IOC Tsunami Ready Programme in India ↗“Information on UNESCO-IOC Tsunami Ready Programme in India In response to December 26, 2004 tsunami, government of India has established Indian Tsunami Early Warning Centre (ITEWC) at Indian National Centre for Ocean”

Question: UPSC's CS (Main) 2017, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 360words · Minimalist IAS

On 26 December 2004 a Mw 9.3 Sumatra-Andaman earthquake displaced the seafloor and sent a tsunami across fourteen countries. In India 10,749 people died and 5,640 went missing (NDMA Guidelines, 2010); there was no warning system that morning.

Factors responsible for the occurrence of tsunami

  • Subduction earthquakes: shallow, high-magnitude quakes where one plate is thrust under another lift the seabed and displace the whole water column; the 2004 wave came from vertical slip on the inter-plate thrust fault.
  • Other triggers: submarine landslides, volcanic collapse (Krakatoa, 1883) and, rarely, meteorite impact.
  • Amplification on arrival: waves slow and rise in shallow water; funnel-shaped bays, flat coasts and lost mangroves and dunes let them run far inland.
  • India's exposure: the Andaman-Sumatra arc in the east and the Makran zone in the Arabian Sea.

The full answer goes on to cover

  1. Effects on life and economy
  2. Mechanisms of preparedness under the NDMA Guidelines (2010)

With 1 flowchart you can reproduce in the exam.

Read the full model answer (360 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

2016

GS Paper III 2016 · Q15

12½ marks · 200 words

The frequency of urban floods due to high intensity rainfall is increasing over the years. Discussing the reasons for urban floods, highlight the mechanisms for preparedness to reduce the risk during such events.

Approach · directive: “discussing / highlight”

What it asks · Explain why cities are flooding more often after intense rain, then set out the preparedness measures that reduce loss of life and property.

It asks 2 things — answer each

  1. Discuss: the reasons for the increasing frequency of urban floods
  2. Highlight: the preparedness mechanisms to reduce risk during such events

Open with · Data: on 26 July 2005 Mumbai received 944 mm of rain in 24 hours and lost at least 479 lives (NDMA, 2010), and Chennai followed in 2015; causes and preparedness must be read together.

Cover

  • Natural causes: more intense short-duration rain linked to climate change, the urban heat island effect, cyclones and storm surge in coastal cities, and high tides blocking outfalls.
  • Land use: encroachment on lakes, wetlands, floodplains and drains, and paved surfaces that cut infiltration and speed up run-off.
  • Infrastructure: drains designed for low rainfall, silted, clogged with waste or missing, weak maintenance, and sudden dam or reservoir releases upstream.
  • Governance: multiple agencies working separately, weak enforcement of building norms and master plans, and no local flood-risk mapping.
  • Preparedness, forecasting: flood-risk mapping and zoning, Doppler radar and rain-gauge networks, IMD nowcasts and warnings, and a coordination protocol with dam operators.
  • Preparedness, systems: drainage master plans, drain desilting before monsoon, restoration of lakes and wetlands, and green measures such as rain gardens, permeable pavements and harvesting.
  • Preparedness, response: early warning to citizens, control rooms, SOPs with trained response forces, shelters, evacuation routes, insurance and public education, as NDMA's 2010 urban flooding guidelines urge.

Close with · Making room for water is how cities meet SDG 11.5, which seeks by 2030 to significantly reduce deaths and economic losses from water-related disasters.

Add value (verified)

  • NDMA (2010): Mumbai, 26 July 2005, 944 mm in 24 hours, 875 mm of it in 12 hours, and at least 479 deaths.NDMA Guidelines: Management of Urban Flooding (2010), Mumbai 2005 case ↗“On 26th July 2005, Mumbai came to a complete halt due to the unprecedented rainfall of 944 mm in 24 hours, starting 0830 on 26 July 2005 with 875 mm occurring in the 12 hours from 1430 to 0230, which resulted in colossal damage to the city with loss of at least 479 lives.”
  • NDMA (2010): older storm drains were designed for only 12-20 mm per hour of rainfall and are easily overwhelmed.NDMA Guidelines: Management of Urban Flooding (2010), drainage design ↗“Stormwater drainage systems in the past were designed for rainfall intensity of 12 - 20 mm. These capacities have been getting very easily overwhelmed whenever rainfall of higher intensity has been experienced.”
  • NDMA (2010) key action points: Ministry of Urban Development as nodal ministry, Urban Flooding Cells at Centre, state and ULB level.NDMA Guidelines: Management of Urban Flooding (2010), executive summary ↗“1. Ministry of Urban Development will be the Nodal Ministry for Urban Flooding 2. Establishment of the Urban Flooding Cell in Ministry of Urban Development (MoUD), State Nodal Departments and ULBs”
  • NDMA (2010): automatic rain gauges at one per 4 sq km in all 2,325 Class I, II and III towns, and a wider Doppler radar network for urban areas.NDMA Guidelines: Management of Urban Flooding (2010), early warning actions ↗“Establishment of Local Network of Automatic Rainfall Gauges (ARGs) for Real-time Monitoring with a density of 1 in every 4 sq km in all 2325 Class I, II and III cities and towns 6. Strategic Expansion of Doppler Weather Radar Network in the country to cover all Urban Areas”
  • SDG 11.5 wording: significantly reduce deaths, people affected and economic losses from disasters, including water-related ones, by 2030.UN SDG 11 targets (sdgs.un.org) ↗“Target 11.5 By 2030, significantly reduce the number of deaths and the number of people affected and substantially decrease the direct economic losses relative to global gross domestic product caused by disasters, including water-related disasters, with a focus on protecting the poor and people in vulnerable situations”

Question: UPSC's CS (Main) 2016, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 288words · Minimalist IAS

On 26 July 2005 Mumbai received 944 mm of rain in 24 hours and lost at least 479 lives (NDMA, 2010); Chennai followed in 2015. Causes and preparedness must be read together.

Reasons for the rising frequency of urban floods

  • Intense rain: short convective downpours over the urban heat island, and in coastal cities storm surge and high tides that block outfalls.
  • Lost sponges: encroachment on lakes, wetlands, floodplains and natural drains; paved surfaces stop infiltration and speed run-off.
  • Under-designed drains: storm drains built for 12-20 mm per hour of rain, silted, clogged with waste and mixed with sewage (NDMA, 2010).
  • Upstream releases: sudden reservoir discharge without downstream warning, as in Chennai in 2015.
  • Fragmented governance: many agencies, weak enforcement of master plans and no local flood-risk maps.

The full answer goes on to cover

  1. Mechanisms for preparedness to reduce risk

With 1 flowchart you can reproduce in the exam.

Read the full model answer (288 words) →

Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

GS Paper III 2016 · Q16

12½ marks · 200 words

With reference to National Disaster Management Authority (NDMA) guidelines, discuss the measures to be adopted to mitigate the impact of the recent incidents of cloudbursts in many places of Uttarakhand.

Approach · directive: “discuss”

What it asks · Discuss measures for reducing loss from cloudbursts in the fragile Uttarakhand Himalaya, in line with NDMA's guidelines on floods and landslides.

It asks 2 things — answer each

  1. Explain: cloudbursts and why they cause such damage in Uttarakhand
  2. Discuss, with reference to NDMA guidelines: the measures to mitigate the impact of cloudbursts

Open with · Definition: NDMA's landslide guidelines call a cloudburst a rain storm of great intensity over a small area for a short duration, and IMD treats about 100 mm in an hour over 20-30 sq km as the threshold; in Uttarakhand's steep valleys it became Kedarnath in June 2013 and Pithoragarh and Chamoli in July 2016.

Cover

  • Hazard: IMD describes a cloudburst as rainfall of about 10 cm (100 mm) or more in an hour over roughly 20-30 sq km; steep slopes and loose debris magnify its effect.
  • Hazard mapping: landslide and flash-flood zonation at village scale, mapping of streams, and marking of unsafe sites, with maps used in planning and permissions.
  • Regulation: no building in river beds, flood plains and steep unstable slopes; hill-specific building codes; controlled road, hydropower and tourism projects and safe disposal of muck.
  • Early warning: more automatic weather stations and radar, rainfall thresholds and timely alerts to villagers and pilgrims through local channels and mobile alerts.
  • Structural and eco measures: slope stabilisation with bio-engineering, retaining walls, drainage and check dams, and afforestation with native species on catchments.
  • Preparedness and response: community-based disaster plans and volunteers, mock drills, trained SDRF and NDRF units, safe shelters, communication links and stock of relief.
  • Recovery: rebuild safer, relocate vulnerable settlements, offer insurance and livelihood support, and monitor implementation of recommendations after each disaster.

Close with · Each measure maps onto the Sendai Framework's four priorities, from understanding risk to Build Back Better; applying them in the Himalaya is India's route to SDG 11.b, local disaster-risk strategies aligned with Sendai.

Add value (verified)

  • NDMA's own definition of a cloudburst (glossary of the landslide guidelines).NDMA Guidelines: Management of Landslides and Snow Avalanches (2009), glossary ↗“Cloudburst Rain storm of great intensity usually over a small area for a short duration.”
  • NDMA on map scale: 1:50,000 maps are only indicative; 1:10,000 or 1:5,000 maps are needed for detailed local landslide hazard zonation.NDMA Guidelines: Management of Landslides and Snow Avalanches (2009), hazard zonation mapping ↗“Maps of 1:1,00,000 or 1:50,000 scales are inappropriate for regional studies since these are only indicative and do not provide adequate details. Larger scale maps on 1:10,000 or 1:5,000 scale are taken up for detailed studies at the local level.”
  • NDMA lists the Rishikesh-Badrinath pilgrimage route in Uttarakhand among the landslide stretches that have been disastrous.NDMA Guidelines: Management of Landslides and Snow Avalanches (2009), introduction ↗“the Rishikesh- Badrinath pilgrimage route in Uttarakhand, highways and roads in Darjeeling and Sikkim, and the Dimapur-Imphal and Shillong-Silchar National Highways in the North-Eastern region have been disastrous”
  • Sendai Framework 2015-2030: four priorities for action, from understanding disaster risk to enhancing preparedness for effective response.UNDRR: Sendai Framework for Disaster Risk Reduction 2015-2030 ↗“four priorities for action to prevent new and reduce existing disaster risks: (i) Understanding disaster risk; (ii) Strengthening disaster risk governance to manage disaster risk; (iii) Investing in disaster reduction for resilience and; (iv) Enhancing disaster preparedness for effective response”
  • SDG 11.b wording: integrated plans for resilience to disasters and holistic disaster risk management in line with Sendai.UN SDG 11 targets (sdgs.un.org) ↗“climate change, resilience to disasters, and develop and implement, in line with the Sendai Framework for Disaster Risk Reduction 2015-2030, holistic disaster risk management at all levels”

Question: UPSC's CS (Main) 2016, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·

Model answer· 293words · Minimalist IAS

NDMA defines a cloudburst as a rain storm of great intensity over a small area for a short duration; IMD's threshold is about 100 mm in an hour over 20-30 sq km. In Uttarakhand's steep, debris-laden valleys it meant Kedarnath in June 2013 and Pithoragarh and Chamoli in July 2016.

Why cloudbursts cause such damage in Uttarakhand

  • Terrain and settlement: flash floods and landslides strike homes on river terraces and unstable slopes; NDMA names the Rishikesh-Badrinath pilgrim route as a disaster-prone stretch.
  • Added debris: road cutting and hydropower muck feed swollen streams, and forecasts cannot yet pinpoint a cloudburst.

The full answer goes on to cover

  1. Measures to mitigate the impact, per NDMA guidelines

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Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.

The Syllabus X-Ray of this syllabus line

1 of its 7 sub-topics is Core

1 Core · 1 High · 3 Steady · 2 Rare

  • Core #45Early warning, resilience & risk reduction · 8 questions
  • HighDisaster management framework: NDMA & Sendai · 4 questions

The X-Ray ranks all 928 sub-topics of the UPSC syllabus by what UPSC has asked since 2016. The 78 Mains Core sub-topics are behind 66% of Mains questions.

See the whole X-Ray →

More of GS Paper III

Quick answers

How many UPSC Mains questions have been asked on Disaster management?

19 questions in GS Paper III from 2016 to 2026, asked in 10 of 11 years, most recently in 2026. Each is above, newest first, with the demand, an approach and a model answer.

What does the UPSC syllabus say on Disaster management?

The GS Paper III syllabus line reads, in UPSC's words: “Disaster and disaster management.”

Where are the GS Paper III PYQs topic-wise as a free PDF?

The GS Paper III syllabus-wise PDF — every question since 2016 under its syllabus line, with an approach — is a free download on the Vault's downloads page (one sign-up, no cost).

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