The number of 'dangerous humid heat days' in India has risen significantly, from an average of 101 days a year in the 1970s to 141 days a year during 2016-2025, according to a new global study.
The study, released by US-based NGO Climate Central, attributed the increase primarily to human-induced climate crisis, with nearly two-thirds (64%) of global dangerous humid heat days since 1970 linked to climate change.
The study found a sharp increase in dangerous humid heat days across Indian cities, with Delhi, Mumbai, and Chennai experiencing significant rises in the number of such days.
Researchers analysed global weather conditions from 1970 to 2025 to determine how often dangerous humid heat occurred and how much of it could be attributed to human-caused climate change.
The study warned that these conditions put many people at risk of heat-related illnesses, particularly older adults, children, pregnant people, individuals with underlying health conditions, and those without access to cooling.
