Delhi Heat Crisis-Temperatures Are on the Rise and Immediate Action is needed

Delhi is experiencing unbearable water stress of heat, as 2025 was the hottest month of February and March ever. The temperatures have soared well past 45degC on many occasions during summers, resulting in India Meteorological Department having to declare heatwave warnings on several occasions. A ten-year plan (2015-2024) indicates that summer temperatures are always above normal, which puts a strain on health, livelihoods, and the environment.

Heat Stress Patterns

• Over 75% of Delhi faces peak summer heat stress.
• According to satellite records, the surface temperature of land in some places is over 45degC.
• The worst affected areas are Najafgarh, Palam and Dwarka.
• Highways and highly populated places aggravate the heat.
• Natural heat buffers include green areas, water bodies and ridges.

Vulnerable Populations

Most at risk are children, the elderly, women, outdoor workers and the poor. Cooling and healthcare access is limited because 80 per cent of the workforce in Delhi works in informal sectors. Almost half of the population occupies wards with 90+ heat and stress zones, and specific action is very important.

Current Measures and Gaps

Basic emergency measures such as water supply, revised working hours, and expansion of hospital facilities offer some short term relief. But they are not resistant to the long run. Pilot projects like cool roofs are good but require more extensive implementation.

Creating Long-term Heat Resilience.

• Intervention mapping at the ward level.
• Passive cooling in shading, reflective paints and ventilation to reduce indoor heat up to 5degC.
• Planting more trees and designing urban areas that are sensitive to water can reduce ambient heat by 3-8degC.
• It is important to incorporate climate-sensitive solutions into the master plan and building codes in Delhi.

Supporting the Vulnerable

It is essential in the safe water, sanitation, cooling centres, rest areas in shade and access to healthcare. Changes such as staggered work timings can minimise risks among indoor labourers. Green infrastructure should be prioritised in heat stressed wards through climate funds and welfare schemes.

Policy Pathways and technology.

Giant rooftops, high-reflective surfaces, and evaporative cooling towers are scalable alternatives. Preparedness will be enhanced through public awareness, early warning mechanisms and integrating policies. The city requires sustainable urban planning to protect Delhi against the increasing heat extremes.