🗞️ Why in News India faces a structural heat governance failure: over 57% of districts — housing 76% of the population — are classified as facing high-to-very-high heat risk. Yet heatwaves are not classified as a “notified disaster” under the Disaster Management Act, 2005, meaning no automatic compensatory or relief mechanism is triggered when heatwaves strike. In 2024, extreme heat cost India 247 billion labour hours and $194 billion in income losses. Over 400-490 million informal workers have zero access to cooling — a crisis that sits at the intersection of climate change, labour law, public health, and governance.
The Scale of India’s Heat Exposure
Climate Data
| Metric | Value |
|---|---|
| Districts with high-to-very-high heat risk | 57% (housing 76% of population) |
| Labour hours lost to heat (2024) | 247 billion hours |
| Income lost to heat (2024) | ~$194 billion |
| Informal workers without cooling access | 400–490 million |
| Heat-related deaths officially recorded annually | ~300-400 (severely undercounted) |
| True heat-related mortality (estimated) | Several thousand/year |
Note: India’s heat-related mortality is dramatically undercounted because:
- Heatstroke deaths must be diagnosed as such; many are attributed to cardiac arrest or organ failure
- Rural deaths go unrecorded
- The absence of a notified disaster framework means no systematic data collection
The “Wet-Bulb Temperature” Problem
Current Indian heatwave classification uses dry-bulb temperature thresholds:
- Heatwave: 40°C+ in plains (4.5°C above normal)
- Severe heatwave: 47°C+ or 6.4°C above normal
But this ignores humidity — the actual physiological threat. The wet-bulb temperature (combining heat and humidity) determines the body’s ability to cool itself through sweating:
- A wet-bulb temperature of 35°C is the theoretical human survivability limit (the body cannot cool itself)
- Parts of coastal India and the Indo-Gangetic Plain have already recorded wet-bulb temperatures of 31-33°C during peak summer
- IPCC projects parts of South Asia crossing the 35°C wet-bulb threshold by 2050 under high-emission scenarios
The Legislative Vacuum
What “Notified Disaster” Status Means
Under the Disaster Management Act, 2005, a “notified disaster” triggers:
- State Disaster Response Fund (SDRF) disbursement for relief
- National Disaster Response Fund (NDRF) for extreme events
- Mandatory disaster management plans at district, state, and national level
- Activation of National Disaster Management Authority (NDMA) protocols
- Legal obligations on employers, local bodies, and hospitals
Heatwaves are currently NOT notified — meaning these mechanisms don’t activate for heat events. Drought and cold waves are notified; heatwaves are not.
Existing Heatwave Policy
India has Heat Action Plans (HAPs) at city and state levels — most comprehensively in Ahmedabad (launched 2013 after a deadly 2010 heatwave). These are voluntary frameworks, not legally binding:
| City/State | HAP Launch | Key Measures |
|---|---|---|
| Ahmedabad | 2013 | Cooling centres, hospital protocols, SMS alerts |
| Odisha | 2016 | State-level HAP; early warning system |
| Delhi | 2017 | HAP with construction worker protections |
| Maharashtra | 2018 | District-level HAPs |
But HAPs are inconsistently implemented, not legally binding, and do not trigger compensation for heat-affected workers.
The Informal Worker Crisis
India’s informal economy employs ~90% of the workforce — construction workers, agricultural labourers, street vendors, delivery workers, domestic workers. For these workers:
- No right to temperature-based work stoppages (unlike formal sector, where some states have guidelines)
- No paid sick leave for heat-related illness
- No occupational heat safety standard (India has no equivalent to OSHA’s heat illness prevention standard)
- No compensation for income lost due to heat
The Code on Occupational Safety, Health and Working Conditions, 2020 (one of the four labour codes) includes provisions for workplace safety — but heat-specific standards have not been notified under it.
India Cooling Action Plan (ICAP)
The India Cooling Action Plan (ICAP), released in 2019 by MoEFCC, is India’s long-term cooling strategy:
| Target | Goal |
|---|---|
| Reduce cooling demand | 20-25% reduction by 2037-38 |
| Reduce refrigerant use | Phase down HFCs under Kigali Amendment |
| Energy efficiency | 25-30% improvement in cooling equipment |
| Cooling access | Thermal comfort for all by 2037-38 |
ICAP acknowledges the “cooling paradox”: increasing cooling demand is driven by rising temperatures, but conventional cooling (air conditioning) runs on electricity often generated from coal — worsening the climate that requires cooling in the first place.
Kigali Amendment
The Kigali Amendment to the Montreal Protocol (2016) — ratified by India in 2021 — mandates phase-down of HFCs (hydrofluorocarbons), powerful greenhouse gases used as refrigerants. India must reduce HFC consumption by 85% by 2047 under this schedule. This creates both regulatory pressure and an opportunity to develop a domestic HFC-free cooling industry.
What India Needs
Policy recommendations from experts:
| Recommendation | Rationale |
|---|---|
| Notify heatwaves as disasters (DM Act amendment) | Triggers SDRF/NDRF, mandatory plans, employer obligations |
| Wet-bulb temperature metric in HAPs | More accurate physiological risk assessment |
| Heat-specific OSH standard under Labour Code | Mandatory rest breaks, shade, water, early stopping |
| Employer liability for heat illness in informal work | Incentivise shade/water/rest provision at construction sites |
| Universal cooling access — community cooling centres | Public infrastructure in heat-vulnerable areas |
| Urban heat island mitigation — green spaces, cool roofs | Long-term temperature reduction in cities |
UPSC Relevance
| Paper | Angle |
|---|---|
| GS1 — Geography | Heatwaves, wet-bulb temperature, Indo-Gangetic Plain, climate change |
| GS2 — Governance | Disaster Management Act 2005, NDMA, SDRF/NDRF, labour law |
| GS3 — Environment | Climate change, IPCC, ICAP, Kigali Amendment |
| GS3 — Economy | Informal economy, labour productivity, income loss |
| Mains Keywords | Heatwave, notified disaster, DM Act 2005, wet-bulb temperature, ICAP, Kigali Amendment, informal workers, HAP, NDMA, SDRF |
Facts Corner
- Heat-risk districts: 57% of India’s districts; 76% of population
- 2024 heat cost: 247 billion labour hours; $194 billion income loss
- Informal workers without cooling: 400-490 million
- Heatwave — NOT a notified disaster under DM Act 2005 (drought and cold wave are)
- Ahmedabad HAP (2013): First city HAP in India; launched after 2010 heatwave
- Wet-bulb 35°C: Human survivability threshold — body cannot cool itself above this
- ICAP (2019): India Cooling Action Plan; 20-25% cooling demand reduction by 2037-38
- Kigali Amendment (2016): HFC phase-down under Montreal Protocol; ratified by India 2021; 85% HFC cut by 2047
- DM Act 2005: Governs disaster declaration; NDMA (national), SDMA (state), DDMA (district)
- NDRF: National Disaster Response Force — operational force for disaster response
- Code on Occupational Safety, Health and Working Conditions, 2020: One of four labour codes; heat standards not yet notified
