What is India's overall climate-disaster picture?

India experiences nearly EVERY MAJOR CATEGORY of climate disaster: HEATWAVES, CYCLONES, FLOODS (riverine, flash, urban), DROUGHTS, GLACIAL LAKE OUTBURST FLOODS (GLOFs), LANDSLIDES, COASTAL EROSION, and FOREST FIRES. NUMBERS: (1) ~75% of India's districts are exposed to extreme weather events (CSE 2023); (2) India ranks among TOP 10 climate-disaster prone countries (Germanwatch Climate Risk Index); (3) Climate extremes cause ~5,000+ deaths annually and ~₹2-3 lakh crore economic losses; (4) NEARLY 80% of POPULATION lives in DISASTER-PRONE DISTRICTS. CMIP6 projections show: (1) Temperature rise of 4.4°C by 2100 under high emissions scenario; (2) Monsoon precipitation variance increasing; (3) Extreme rainfall events frequency tripling 1950-2015; (4) Sea level rise of 30-50cm by 2100 (affecting major coastal cities). KEY CLIMATE-DRIVEN DISASTERS by trend: (a) HEATWAVES — 4× increase in frequency 1990-2022; deadly 2024 with 530+ confirmed deaths; (b) CYCLONES — increasing intensity though not frequency; Arabian Sea cyclones rising; (c) URBAN FLOODS — every megacity has had major flooding; (d) GLOF — increasing as glaciers melt; (e) LANDSLIDES — Himalayan and Western Ghats areas seeing more events. INDIA'S CLIMATE RISK is among the highest globally given its: (1) Long coastline (7,517 km); (2) Himalayan glacier-fed rivers; (3) Tropical climate; (4) High population density; (5) Heavy monsoon dependence. CLIMATE CHANGE is changing the DISASTER PROFILE from EPISODIC to CHRONIC — the 2005 DM Act architecture needs to adapt.

What are India's heatwave trends and recent extremes?

HEATWAVES are India's FASTEST-RISING climate disaster. IMD DEFINITION (criteria for declaring heatwave): (1) Maximum temperature reaching at least 40°C (plains), 37°C (coastal), 30°C (hilly); (2) Departure from normal of 4.5-6.4°C (heatwave) or >6.4°C (severe heatwave); (3) Or actual maximum reaching 45°C (heatwave) or 47°C (severe). RECENT EXTREMES: (1) 2024 — DEADLIEST heatwave year on record; 530+ confirmed deaths (likely undercount); 16,000+ heatstroke cases; temperatures hit 50°C+ in Delhi, Rajasthan, UP; (2) DELHI hit 49.9°C on 29 May 2024 (highest in city's recorded history; some weather stations recorded 52.9°C but later revised); (3) HEATWAVE DAYS — 23 in 2010; 110+ in 2022; rising trend; (4) 2022 March-April heatwave was earliest on record. CAUSES: (1) CLIMATE CHANGE — IPCC AR6: 1.1°C warming since pre-industrial; India warming faster; (2) URBAN HEAT ISLANDS — Delhi, Mumbai, Chennai, Bengaluru core temperatures 4-5°C above surrounding rural; (3) DEFORESTATION + URBANISATION reducing cooling capacity; (4) WESTERN DISTURBANCE reduction; (5) EL NIÑO years (2023-24 was El Niño) amplify heatwaves. IMPACTS: (1) MORTALITY — vulnerable groups (elderly, outdoor workers, slum dwellers); (2) WORK CAPACITY — productivity loss ~₹3 lakh crore/year (ILO estimate); (3) CROP LOSS — wheat 2022 hit by heat shock; (4) WATER STRESS — reservoirs depleting; (5) HEALTH SYSTEM stress — hospitals overrun. POLICY RESPONSE: (1) IMD HEAT WAVE EARLY WARNING SYSTEM — colour-coded forecasts; (2) NDMA NATIONAL HEAT WAVE GUIDELINES 2016; (3) STATE HEAT ACTION PLANS — Ahmedabad (first 2013), 23 states now; (4) URBAN GREEN COVER targets; (5) COOL ROOF programmes; (6) WORKING HOUR ADJUSTMENTS for outdoor labour. CHALLENGES: (1) Most HAPs are paper-only; (2) Last-mile dissemination weak; (3) Insurance unavailable for heat losses; (4) Long-term urban planning slow.

What are recent major cyclones and India's response?

India experiences cyclones from BOTH the BAY OF BENGAL (most) and ARABIAN SEA (recently increasing). The Bay of Bengal accounts for ~80% of historical cyclones; Arabian Sea share rising due to climate change. RECENT MAJOR CYCLONES: (1) CYCLONE PHAILIN October 2013 — Odisha; ~45 deaths (down from ~10,000 in similar 1999 cyclone); IMD-led pre-positioning success; (2) HUDHUD October 2014 — Andhra Pradesh; ~120 deaths; (3) CYCLONE OCKHI November 2017 — Kerala-Tamil Nadu; 245 deaths; (4) FANI May 2019 — Odisha; largest pre-cyclone evacuation in Indian history (~1.5 million); 89 deaths; (5) AMPHAN May 2020 — West Bengal-Odisha during COVID; ~128 deaths; ₹1.02 lakh crore damages; super-cyclone category; (6) NISARGA June 2020 — Maharashtra; (7) YAAS May 2021 — West Bengal-Odisha; (8) MICHAUNG December 2023 — Tamil Nadu (Chennai); urban flooding; (9) BIPARJOY June 2023 — Gujarat; pre-emptive evacuation 1.5+ lakh; minimal deaths; (10) MOCHA May 2023 — Andhra-Myanmar; (11) REMAL May 2024 — Bengal-Bangladesh. ARABIAN SEA: (1) TAUKTAE May 2021 — Maharashtra/Gujarat; record intensity; (2) BIPARJOY 2023; (3) ASNA August 2024 — Saurashtra. RESPONSE ARCHITECTURE: (1) IMD CYCLONE WARNING DIVISION — issued forecasts; (2) NDRF + SDRF pre-positioning; (3) State-level evacuation infrastructure; (4) CYCLONE SHELTERS — over 800 multi-purpose cyclone shelters along Odisha-AP coast; (5) NATIONAL CYCLONE RISK MITIGATION PROJECT (NCRMP) — World Bank-supported; (6) ESCAP/WMO Tropical Cyclone names — India is part of 13-country panel naming cyclones. SUCCESS STORY: Odisha's transformation from 1999 super-cyclone (10,000+ deaths) to Phailin 2013 (~45 deaths) is studied globally.

What are India's recent urban flooding and landslide disasters?

URBAN FLOODS are India's FASTEST-RISING urban disaster. KEY EVENTS: (1) MUMBAI 26 JULY 2005 — ~944 mm in 24 hours (highest single-day Indian rainfall on record); 1,094 deaths; ₹450 crore damages; led to Madhav Chitale Committee; (2) CHENNAI DECEMBER 2015 — ~470 deaths; 1.8 million displaced; insurance claims ₹15,000 crore; (3) KERALA AUGUST 2018 — ~483 deaths; 14 districts affected; severe rainfall + Mullaperiyar Dam overflow; (4) BENGALURU AUGUST-SEPTEMBER 2022 — Outer Ring Road and tech corridor flooded; IT companies declared work-from-home; storm-water drain encroachment exposed; (5) DELHI YAMUNA July 2023 — record floods; ITO and central areas under water; (6) CHENNAI DECEMBER 2023 — Cyclone Michaung urban flooding repeated; (7) MUMBAI Multiple events 2024-25; (8) PATNA, GUWAHATI, KANPUR — recurring annual urban floods. CAUSES: (1) Unplanned urbanisation; (2) Storm-water drain encroachment; (3) Loss of wetlands and lakes; (4) Climate change (extreme rainfall events); (5) Inadequate drainage capacity; (6) Land subsidence in some areas. LANDSLIDES & FLASH FLOODS — Himalayan and Western Ghats areas: (1) KEDARNATH FLASH FLOODS June 2013 — Uttarakhand; ~5,700+ deaths; rapid melt + extreme rain; (2) JOSHIMATH SUBSIDENCE January 2023 — ~700+ buildings cracked; town being relocated; (3) CHAMOLI Rishiganga FLASH FLOOD February 2021 — GLOF-like event; ~200+ deaths; rock-ice avalanche; (4) WAYANAD LANDSLIDE 30 JULY 2024 — Kerala; ~400+ deaths; deadliest landslide in Indian history; deforestation + intense rainfall; led to debate on Western Ghats Madhav Gadgil/Kasturirangan recommendations. GLACIAL LAKE OUTBURST FLOODS (GLOF) — emerging Himalayan threat: (1) SOUTH LHONAK LAKE GLOF October 2023 — Sikkim; Teesta River; ~80+ deaths; ~14,000 displaced; Chungthang Dam destroyed; first major GLOF disaster in Indian Himalayas; (2) Many of India's 7,500+ Himalayan glacial lakes are growing/becoming unstable as glaciers retreat. India has identified ~189 PRIORITY LAKES needing risk assessment.

What is India's response and policy direction on climate disasters?

INDIA'S CLIMATE DISASTER RESPONSE has multiple components. INSTITUTIONAL: (1) DM Act 2005 architecture (NDMA, SDMA, DDMA); (2) NDRF + SDRFs; (3) NDMA-issued specific guidelines on heatwaves (2016), cyclones, urban floods, GLOFs (2020), landslides; (4) National Cyclone Risk Mitigation Project (NCRMP) — World Bank-supported. EARLY WARNING SYSTEMS: (1) IMD for weather forecasting + heat-wave + cyclone alerts; doppler radar network expansion; (2) CWC (Central Water Commission) for flood forecasting; (3) INCOIS (Indian National Centre for Ocean Information Services) for tsunami + storm surge; (4) GSI (Geological Survey of India) for landslides; (5) BIS-NIDM heatwave guidelines; (6) RAPID alerts via SMS; common alerting protocol (CAP). FINANCIAL: (1) NDRF + SDRF (15th FC ₹1.6 lakh cr 2021-26); (2) PMNRF + PM-CARES; (3) NATIONAL DISASTER MITIGATION FUND (operational 2021); (4) INSURANCE schemes — Restructured Weather-Based Crop Insurance (RWBCIS); but uptake low. STATE-LEVEL HEAT ACTION PLANS — Ahmedabad pioneered 2013; ~23 states + 130+ cities have HAPs; quality variable. CLIMATE-ADAPTED INFRASTRUCTURE: (1) National Adaptation Fund for Climate Change (NAFCC); (2) Mission on Sustainable Habitat (NMSH); (3) Building Code revisions; (4) Cyclone shelter network. INTERNATIONAL LEADERSHIP: (1) CDRI 2019 — flagship initiative; (2) International Solar Alliance; (3) PM's 10-point DRR agenda; (4) Bay of Bengal Tsunami Warning System. POLICY DIRECTION 2024-26: (1) Disaster Management (Amendment) Bill 2024 (in Parliament) — strengthen NDMA, address urban + climate disasters specifically; (2) National Glacial Lake Risk Reduction Programme; (3) HEAT ACTION PLANS expansion + enforcement; (4) Climate Adaptation funding scale-up; (5) National Cooling Action Plan implementation; (6) Building Code revisions for climate resilience; (7) Updated National Disaster Management Plan (2024). CHALLENGES: (1) FINANCING gap — adaptation needs ~$2 trillion by 2030 (NIPFP); (2) State-level capacity uneven; (3) Climate-induced displacement and migration grow; (4) Insurance penetration low; (5) Last-mile dissemination of warnings.

Climate Disasters in India — Heatwaves, Cyclones, Floods, GLOF | UPSC Notes

Why this matters now

Climate change is amplifying India's disaster profile. The 2005 DM Act architecture, designed for episodic events, is now being stress-tested by chronic, climate-induced extremes. Three reasons this is essential UPSC GS-3 reading. First, recent disasters (Wayanad 2024, Sikkim GLOF 2023, Delhi 49.9°C 2024) are now textbook case studies. Second, the IPCC AR6 projections for India (4.4°C warming, sea level rise, monsoon variability) shape every future policy debate. Third, India's leadership through CDRI (2019) and the proposed Disaster Management (Amendment) Bill 2024 are live policy actions.

75%

Districts climate-exposed

49.9°C

Delhi record 29 May 2024

400+

Wayanad landslide deaths 2024

189

Priority Himalayan glacial lakes

India's climate-disaster risk picture

~75% of India's districts exposed to extreme weather events (CSE 2023);
Among top 10 climate-disaster prone countries (Germanwatch Climate Risk Index);
Climate extremes cause ~5,000+ deaths annually and ₹2-3 lakh crore economic losses;
~80% of population lives in disaster-prone districts;
CMIP6 projects 4.4°C warming by 2100 under high emissions; sea level rise 30-50 cm; extreme rainfall events tripled 1950-2015.

Heatwaves — the fastest-rising disaster

IMD definition

Heatwave declared when maximum temperature reaches at least 40°C in plains (37°C coastal, 30°C hilly), with departure from normal of 4.5-6.4°C (heatwave) or >6.4°C (severe heatwave); or actual max reaching 45°C / 47°C respectively.

Recent extremes

2024 — deadliest heatwave year on record; 530+ confirmed deaths (likely undercount); 16,000+ heatstroke cases;
Delhi 29 May 2024 — 49.9°C; highest in city's recorded history;
Heatwave days — 23 in 2010; 110+ in 2022; rising trend;
2022 March-April — earliest heatwave on record.

Causes

Climate change — 1.1°C global warming since pre-industrial; India warming faster;
Urban Heat Islands — Delhi, Mumbai, Chennai, Bengaluru cores 4-5°C above rural surroundings;
Deforestation + urbanisation reducing cooling capacity;
Western Disturbance reduction;
El Niño amplification (2023-24 was El Niño).

Impacts

Mortality concentrated among elderly, outdoor workers, slum dwellers;
Productivity loss ~₹3 lakh crore/year (ILO estimate);
Crop loss — wheat 2022 hit by heat shock;
Water stress — reservoirs depleting;
Health system stress — hospitals overrun.

Policy response

IMD heatwave early warning system — colour-coded forecasts;
NDMA National Heat Wave Guidelines 2016;
State Heat Action Plans — Ahmedabad first (2013); ~23 states have HAPs now;
Urban green cover targets;
Cool roof programmes;
Working hour adjustments for outdoor labour.

Cyclones — fewer but stronger

Year	Cyclone	State	Deaths
2013	Phailin	Odisha	~45
2014	Hudhud	Andhra Pradesh	~120
2017	Ockhi	Kerala-TN	245
2019	Fani	Odisha	89 (1.5M evacuated)
2020	Amphan	WB-Odisha	~128 (₹1.02 lakh cr loss)
2021	Tauktae (Arabian)	Maharashtra-Gujarat	~150
2021	Yaas	WB-Odisha	~10
2023	Biparjoy (Arabian)	Gujarat	~5 (1.5L evacuated)
2023	Michaung	Tamil Nadu	~30 (Chennai flooding)
2024	Remal	WB-Bangladesh	~25

Arabian Sea share of cyclones is rising due to climate change. Bay of Bengal still accounts for ~80% historically.

Response architecture

IMD Cyclone Warning Division;
NDRF + SDRF pre-positioning;
State-level evacuation infrastructure;
800+ multi-purpose cyclone shelters along Odisha-AP coast;
National Cyclone Risk Mitigation Project (NCRMP) — World Bank-supported.

Odisha model — from 10,000+ deaths in the 1999 super-cyclone to ~45 in 2013's Phailin — is now studied globally as a success story.

Urban flooding

Year	City	Impact
26 Jul 2005	Mumbai	944mm/24hrs; 1,094 deaths; led to Chitale Committee
Dec 2015	Chennai	~470 deaths; 1.8M displaced; ₹15,000cr claims
Aug 2018	Kerala	~483 deaths; 14 districts; Mullaperiyar concerns
Aug-Sep 2022	Bengaluru	IT corridor flooded; storm-drain encroachment exposed
Jul 2023	Delhi Yamuna	Record floods; ITO under water
Dec 2023	Chennai	Cyclone Michaung urban flooding repeated

Causes: unplanned urbanisation; storm-water drain encroachment; loss of wetlands; climate change (extreme rainfall); inadequate drainage capacity; land subsidence.

Landslides & Wayanad — the deadliest in Indian history

Kedarnath flash floods 13-17 June 2013 — Uttarakhand; ~5,700+ deaths; rapid melt + extreme rain;
Joshimath subsidence January 2023 — 700+ buildings cracked; town being relocated;
Chamoli Rishiganga flash flood 7 February 2021 — GLOF-like event; ~200+ deaths; rock-ice avalanche;
Wayanad landslide 30 July 2024 — Kerala; 400+ deaths; deadliest landslide in Indian history; revived the debate on Western Ghats Madhav Gadgil (2011) / Kasturirangan (2013) recommendations.

GLOF — Sikkim 2023

Glacial Lake Outburst Floods (GLOF) are an emerging Himalayan threat. India has identified 189 priority lakes needing risk assessment among 7,500+ Himalayan glacial lakes.

South Lhonak Lake GLOF, 3 October 2023 — Sikkim; Teesta River; ~80+ deaths; ~14,000 displaced; the Chungthang dam destroyed. India's first major GLOF disaster in the Himalayas — a preview of what climate change is bringing to a long stretch of the Himalayan belt.

Early warning & response architecture

Agency	Hazard
India Meteorological Department (IMD)	Weather; heatwaves; cyclones
Central Water Commission (CWC)	Riverine floods
INCOIS	Ocean — tsunami, storm surge
Geological Survey of India (GSI)	Landslides
NDMA + NDRF + SDRFs	Coordinated response

Common Alerting Protocol (CAP) + SMS-based rapid alerts. Last-mile dissemination — especially to remote, tribal, and informal settlements — remains the weakest link.

Policy direction 2024-26

Disaster Management (Amendment) Bill 2024 — strengthens NDMA, addresses urban + climate disasters specifically;
National Glacial Lake Risk Reduction Programme;
Heat Action Plans expansion + enforcement;
Climate Adaptation funding scale-up — National Adaptation Fund for Climate Change (NAFCC) and Mission on Sustainable Habitat;
National Cooling Action Plan;
Building Code revisions for climate resilience;
Updated National Disaster Management Plan (2024 expected).

Financing gap is the binding constraint — adaptation needs ~$2 trillion by 2030 (NIPFP).

"India's disaster architecture was built for episodic events. Climate change is making disasters chronic. The next decade requires a re-engineering of the DM Act, the financing model, and the urban planning regime — all simultaneously." — paraphrasing the 15th Finance Commission's chapter on disaster financing

UPSC PYQs and likely future questions

UPSC angle

Climate disasters are a recurring GS-3 theme. Strong answers cite specific recent events (Wayanad 2024, Sikkim GLOF 2023, Delhi 49.9°C 2024), the early warning architecture (IMD, CWC, INCOIS, GSI), and policy responses (HAPs, NCRMP, NAFCC, NMSH).

2019 GS-3: "Disaster preparedness is the first step in any successful disaster management programme. Discuss."
2022 GS-3: "How is fertilizer to use being affected by climate change in India? Why are heatwaves becoming more frequent? Discuss."
2024 GS-3: "Examine the policy response to recent climate-induced disasters — Sikkim GLOF 2023, Wayanad landslide 2024 — under the DM Act framework."
2017 GS-3: "On December 2004, the Tsunami brought havoc on 14 countries including India. Discuss the factors responsible for the deaths and what measures could be effective to lessen the damage by such events?"
Likely 2026: "Discuss the rise of urban flooding in Indian metros. What systemic reforms are needed?"
Likely 2026: "Examine India's response to glacial lake outburst floods in the Himalayan region post-Sikkim 2023."

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Disaster Management cluster — 2/4

Two more deep-dives upcoming: Industrial & Chemical Disasters (Bhopal legacy, NDMA guidelines); Pandemic Preparedness post-COVID (One Health, IDSP 2.0).

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