Why in News
IMD has issued heatwave alerts for West Rajasthan, Punjab, Haryana, and parts of Delhi-NCR for May 1-5, 2026 with temperatures reaching 44-48°C. The principal administrative response to heatwaves in India is the Heat Action Plan (HAP) framework — a NDMA-coordinated approach adopted by 23 of India’s 28 states as of 2026. The framework’s effectiveness, gaps, and adaptation to climate change define how India responds to one of the world’s deadliest natural hazards.
What is a Heat Action Plan?
A Heat Action Plan (HAP) is a state or city-level operational document specifying how the government will:
- Forecast heatwaves using IMD data and local weather stations
- Communicate warnings to vulnerable populations
- Implement cooling measures (cooling centres, water distribution)
- Manage health responses (hospital preparedness, mortuary services)
- Coordinate across departments (health, transport, electricity, water supply)
- Evaluate post-season for continuous improvement
The first major HAP in India was developed by Ahmedabad in 2013 — following a 2010 heatwave that killed over 1,300 people in the city. The Ahmedabad HAP became the model for subsequent state HAPs.
IMD’s Heatwave Definition (For Context)
| Region | Heatwave Threshold | Severe Heatwave Threshold |
|---|---|---|
| Plains | Maximum ≥ 40°C; departure ≥ 4.5°C | Departure ≥ 6.4°C |
| Coastal | Maximum ≥ 37°C; departure ≥ 4.5°C | Departure ≥ 6.4°C |
| Hilly | Maximum ≥ 30°C; departure ≥ 4.5°C | Departure ≥ 6.4°C |
A heatwave declaration triggers HAP implementation in the affected state/district.
The HAP Framework — Key Components
Phase 1 — Pre-Season Preparedness (March-April)
- HAP review and update
- Inter-departmental coordination meeting
- Stockpiling water, ORS, ice, oxygen
- Hospital preparedness — special heat wards
- Public awareness campaigns
Phase 2 — Real-Time Response (April-June)
- IMD daily forecasts → State Emergency Operations Centre
- Yellow/Orange/Red alerts trigger different response levels
- Cooling centres activated
- Free water distribution at construction sites, bus stands, railway stations
- Ambulance pre-positioning
- Targeted SMS alerts (now CB alerts post-May 2, 2026)
Phase 3 — Post-Season Evaluation (July-August)
- Mortality data analysis
- HAP updates based on actual response
- Capacity building for next year
Mortality and Public Health Impact
Heatwaves are India’s deadliest natural hazard (more than cyclones, floods, or earthquakes in mortality terms over the past decade).
| Year | Reported Heatwave Deaths in India |
|---|---|
| 2010 | ~1,300+ (Ahmedabad alone) |
| 2015 | ~2,500 (national) |
| 2024 | ~700+ (May-June) |
| 2025 | Approximately 4,400+ (per SOE 2026 — broader extreme weather) |
The actual mortality is often higher than reported because:
- Heat-related deaths attributed to underlying conditions (cardiovascular, dehydration)
- Outdoor workers, elderly, homeless are systematically undercounted
- Many heat deaths happen at home, not in hospitals
Vulnerable Populations
HAPs identify specific vulnerable groups requiring targeted intervention:
- Outdoor workers — construction, agriculture, street vendors, gig workers
- Children and elderly — schools, anganwadis, old-age homes
- Pregnant women — maternal health centres
- Homeless and slum dwellers — limited access to cooling
- Patients with cardiovascular/respiratory conditions — pre-existing vulnerability
- Working women — often outdoor work + household responsibilities
States with Operational HAPs (2026)
23 of 28 states + multiple cities have operational HAPs as of 2026, including:
- Gujarat (Ahmedabad model — first comprehensive HAP, 2013)
- Maharashtra (Mumbai, Pune)
- Telangana and Andhra Pradesh (severe heat zones)
- Odisha (post-2010 heatwave deaths)
- Rajasthan and Punjab (extreme heat zones)
- Delhi (Master HAP for NCR)
- Bihar, UP, MP — varying levels of operationalisation
States without comprehensive HAPs (or weak HAPs): Northeast states, Himachal Pradesh, J&K (heat is not historical priority but climate change is changing this).
Gaps and Challenges
| Concern | Issue |
|---|---|
| Worker protection | Construction, agriculture, gig workers lack legal protection from heat exposure |
| Cooling centre underutilisation | Many sites unstaffed or unreachable for vulnerable populations |
| Power grid stress | Heatwaves drive AC use; grid failures concentrate during peak heat |
| Water access | Water distribution chains break down during extreme heat |
| Climate adaptation gap | HAPs designed for historical weather; not yet adapted for climate-changed extremes |
Climate Change and Future Heat
India’s pre-monsoon heat is intensifying due to climate change. The State of India’s Environment (SOE) 2026 documented:
- 331 of 334 days of extreme weather in 2025
- 4,419 deaths from extreme weather (2025)
- 17.4 million hectares of cropped land affected
Future heat risk will require:
- HAPs in hilly states (where heat was previously rare)
- Integration with Climate Action Plans (CAPs) at state level
- Worker protection legislation
- Built environment changes (cool roofs, urban tree cover, ventilation in housing)
- Power grid hardening for sustained peak demand
UPSC Relevance
| Paper | Angle |
|---|---|
| GS3 — Disaster Management | NDMA Heat Action Plans; heatwave classification; vulnerable populations |
| GS3 — Environment | Climate change adaptation; extreme weather; heat as health hazard |
| GS2 — Governance | State-level operational planning; inter-departmental coordination |
Mains Keywords: Heat Action Plan, NDMA, Ahmedabad HAP 2013, IMD heatwave definition, vulnerable populations, climate adaptation, cooling centres, urban heat island, SOE 2026, 23 states HAP coverage
Facts Corner
| Item | Fact |
|---|---|
| First HAP | Ahmedabad, 2013 (after 2010 heatwave) |
| States with HAPs | 23 of 28 (2026) |
| Heatwave threshold (plains) | ≥ 40°C with ≥ 4.5°C departure |
| Severe heatwave | Departure ≥ 6.4°C |
| 2010 Ahmedabad deaths | 1,300+ |
| 2025 extreme weather deaths | 4,419 (SOE 2026) |
| Vulnerable groups | Outdoor workers, children, elderly, pregnant women, homeless |
| Cool roof guideline | Bureau of Indian Standards specifies SRI for reflective roofing |
| Climate Action Plans | State-level CAPs increasingly integrating with HAPs |
| Forecast source | IMD; State Emergency Operations Centre |
