Climate ChangeLoss of greenery drives increased temperatures, particularly in slumsPeople on a hot day in New Delhi on June 7. A recent study by the Centre for Science and Environment found that Delhi's ability to cool down during the night has declined 9% over the past decade. © Getty ImagesANANTA AGARWALJune 11, 2026 09:23 JSTBENGALURU -- India's cities are becoming significantly hotter, not only because of climate change but because of the way they're being built, with researchers increasingly warning that rapid, poorly planned urbanization is amplifying heat stress for hundreds of millions of low-income residents.