On average, the report finds that people over 65 now experience about 900 hours each year when heat severely restricts safe outdoor activity, compared with 600 hours in 1950. In some tropical and subtropical regions, heat restricts outdoor activity for older adults for between one-quarter and one-third of the year. View image in fullscreen A volunteer pours water on a man’s head during a May 2024 heatwave in Karachi, Pakistan. The study, which was led by scientists from the Nature Conservancy and published in the journal Environmental Research: Health on Tuesday, goes further than previous research on global heat risks by examining the social and physiological capacity to adapt to heat. This revealed that more and more people in an ever widening area of the world are suffering liveability limitations due to rising heat.

Source: The Guardian March 11, 2026 03:22 UTC