Rising temperatures making it hard even for young, healthy people to safely do normal physical tasks in many regions

Climate breakdown is shrinking the amount of time that people can safely go about their lives, according to a study that shows a third of the world’s population now resides in areas where heat severely limits activity.

Rising temperatures, driven by the continued burning of fossil fuels, are making it difficult even for many young, healthy adults to do basic physical activities, such as housework or walking up stairs during daylight hours at the height of the summer, the report warns.