India, June 2 -- Delhi's nights are warming rapidly, with the city recording its hottest night in 14 years at 32.4degC.

This signals a sharp decline in post-sunset cooling.

A CSE report links this to urbanisation, loss of green and blue spaces and rising AC use.

It urges cool roofs, climate-sensitive planning and public cooling centres to manage escalating heat stress.

Delhi is no longer cooling down after sunset in summers and warm nights are increasing the risk of prolonged heat stress, according to a new report released by the Centre for Science and Environment (CSE).

The city recorded its warmest night in 14 years on May 25, 2026, according to the report, Making Delhi Heat-Resilient. On this day, the minimum temperature touched 3...