India’s Heat Crisis, Causes, Impacts on Health and Economy

India’s heat crisis has become a major climate, economic, and public health challenge, moving beyond seasonal discomfort to a structural issue affecting productivity, livelihoods, agriculture, and urban systems.

According to the India Meteorological Department (IMD), 2024 was India’s warmest year since 1901, with temperatures about 0.65°C above the long-term average, reflecting a clear climate change-driven warming trend and rising heat extremes.

India’s Heat Crisis Nature

India’s heat crisis is becoming more widespread, frequent, and intense, turning into a major climate risk for the country.

• Heatwaves that were earlier concentrated in the arid northwest and central India are now affecting humid coastal regions and even traditionally moderate areas. 
• Recent assessments show that over 57 percent of India’s districts are now heat-prone, covering nearly 76 percent of the population.
• 2024 recorded one of the longest heatwaves in India, with several states experiencing temperatures above 40°C for extended periods.
• Cities like Delhi and Rajasthan recorded extreme temperatures nearing 50°C during peak heat events (IMD reports, 2024).
• The urban heat island effect is further intensifying temperatures in densely populated areas due to concretisation, reduced vegetation, and high energy use.
• Seasonal patterns are becoming unstable, with early onset of heat as seen in 2026 when warm conditions began in February. As a result, the duration of heat exposure is increasing, leading to longer and more continuous periods of heat stress

Reasons for India’s Rising Heat Crisis

The growing heat crisis is driven by a combination of global, regional, and structural factors.

• Climate Change and Global Warming: Rising global temperatures have increased the frequency and intensity of heatwaves. The IPCC Sixth Assessment Report confirms that heatwaves have become more frequent and intense globally due to anthropogenic warming.
• Rapid Urbanisation and Urban Heat Island Effect: Unplanned urban expansion, concrete infrastructure, and high population density trap heat in cities, creating urban heat islands that significantly raise local temperatures.
• Deforestation and Loss of Green Cover: According to Forest Survey of India reports, urban green cover in several metropolitan regions has declined due to infrastructure expansion. Reduced vegetation cover limits natural cooling, disrupts microclimates, and increases surface temperatures.
• Industrialisation and Energy Emissions: Growing industrial activity and transport emissions contribute to greenhouse gas accumulation and localized heat generation. During heatwaves in 2024, India’s electricity demand reached record highs (reported by Power Ministry and GRID-India), further increasing heat stress. 
• Geographic Vulnerability: India’s tropical and semi-arid geography naturally predisposes large regions to high baseline temperatures, which are now being intensified by climate change.
• Weak Adaptation Systems: Limited urban planning for heat resilience, inadequate cooling infrastructure, and weak public health preparedness further amplify vulnerability.

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Impact of India’s Heat Crisis

India’s heat crisis has wide-ranging consequences across social, economic, environmental, and public health dimensions. Its impacts are increasingly systemic, affecting both productivity and human well-being, with a disproportionate burden on vulnerable populations.

• Thermal Injustice: The concept of thermal injustice highlights how heat burden is unequal across society. Heatwaves disproportionately affect the poor, elderly, children, and informal workers. According to CEEW, vulnerable groups such as construction workers, gig workers, and slum dwellers face the highest exposure to heat stress.
• Economic Impact: Studies suggest potential GDP loss of up to 4.5 percent by 2030 due to heat stress (CEEW analysis).
• Labour and Informal Sector Impact: Unlike those with access to private cooling, construction workers, street vendors, and delivery partners have zero cooling autonomy; even small temperature increases reduce their productivity and income, forcing them to choose between health and livelihood.
• Agricultural Impact: Heat stress reduces crop yield, increases irrigation demand, and disrupts sowing cycles. This threatens food security, especially for heat-sensitive crops like wheat.
• Public Health Impact: Heatwaves increase heatstroke, dehydration, and cardiovascular stress. In 2024, India reported over 44,000 heatstroke cases during peak summer conditions (CEEW and media reports). However, underreporting remains a major issue due to weak surveillance systems.

Government Initiatives

India has taken several policy and administrative measures to reduce heat-related risks, although their implementation and effectiveness vary across regions.

• Heat Action Plans (HAPs): Implemented in multiple states and cities, these plans focus on early warning systems, public advisories, and inter-agency coordination; the Ahmedabad Heat Action Plan is widely cited as a successful example in reducing heat-related mortality.
• India Meteorological Department (IMD) Alerts: The India Meteorological Department issues heatwave warnings, colour-coded alerts, and improved district-level forecasts to enable timely preparedness and response.
• NDMA Guidelines: The National Disaster Management Authority provides a national framework for heatwave management, focusing on awareness, preparedness, and emergency response mechanisms.
• Public Health Measures: Governments have established heatstroke wards in hospitals, launched awareness campaigns, and ensured the availability of safe drinking water in public spaces during peak summer.
• Urban Cooling Measures: Initiatives such as cool roofs, shaded infrastructure, and public water kiosks have been introduced in some cities to reduce urban heat exposure.

Legal and Policy Gaps in Heat Governance

Despite existing efforts, significant legal and institutional gaps continue to limit India’s ability to effectively manage the heat crisis.

• Heatwaves Not Notified as a Disaster: Heatwaves are not recognised under the Disaster Management Act, 2005, which restricts access to national disaster funds and large-scale mitigation efforts.
• Weak Labour Law Coverage: Laws such as the Factories Act, 1948 exclude most outdoor workers, while the Occupational Safety, Health and Working Conditions Code, 2020 lacks enforceable heat safety provisions.
• Non-Binding Heat Action Plans: Most HAPs remain advisory in nature, without legal backing, dedicated funding, or strict implementation mechanisms.
• No Income Protection: Informal workers suffer wage losses during heatwaves without compensation or social security support.
• Gig Economy Vulnerability: Delivery and platform workers face algorithm-driven pressure to meet targets even during extreme heat, without rest periods or hazard pay.
• Inadequate Heat Measurement System: India relies mainly on temperature-based criteria, ignoring humidity, which leads to underestimation of actual heat stress levels.

Measures Needed to Address India’s Heat Crisis

Addressing India’s heat crisis requires a shift from reactive measures to a comprehensive and proactive governance framework.

• Recognise Heatwaves as a National Disaster: Heatwaves should be included in the notified disaster list, as recommended for the Finance Commission cycle, to enable better funding and institutional response.
• Adopt Heat Index-Based Warning System: The India Meteorological Department should adopt the heat index, which combines temperature and humidity, for more accurate heatwave assessment.
• Strengthen Labour Protection: The government must enforce mandatory work-rest cycles, ensure employer responsibility for hydration and protective equipment, and regulate outdoor working hours.
• Protect Informal and Gig Workers: Legal safeguards should be introduced to prevent wage loss, remove penalties during heat alerts, and ensure safe working conditions.
• Recognise Right to Cooling: Building on the M.K. Ranjitsinh & Ors. v. Union of India & Ors, access to cooling infrastructure such as shelters, shaded spaces, and drinking water should be treated as part of the right to life under Article 21.
• Introduce Compensation Mechanisms: The government should promote heat insurance and income protection schemes, such as those developed by the Self-Employed Women’s Association, to support workers during extreme heat conditions.