Extreme Heat Is Making Life Increasingly Unlivable
The number of hours where it’s too hot for everyday activities has doubled since 1950, a new study found.
Pedestrians cool off under a water mist spray in Ginza district during high temperatures in Tokyo, Japan, in August 2025.
Photographer: Soichiro Koriyama/BloombergThe number of days where extreme heat makes it too dangerously hot to walk the dog, sweep the porch and engage in other ordinary pursuits has doubled around the world over the past 75 years, according to new research.
Scientists determined that on average, those 65 and older experience a month a year when heat prevents them from routine activities. Parts of Asia, Africa, Australia and North America are becoming unlivable for senior citizens, the researchers said. Younger adults also are losing time as climate-driven heat restricts their lives for 50 hours a year.