India’s dangerously torrid summer days have long been a climate warning. Now the country is increasingly dealing with sweltering nights too, as global warming and poor urban planning put millions at risk.
For eight of the past 10 years, average minimum temperatures during March to May — a proxy for nighttime heat over the pre-monsoon season — have been higher than the long-term average, according to data from the India Meteorological Department. Only 2020 and 2023 bucked the trend.
