A wet bulb temperature of 35 degrees Celsius has long been called the limit of human survival, the point where sweat can no ...

The body’s cooling defenses fail at lower “wet bulb” temperatures than scientists had estimated. By Clayton Dalton Last month was the second-hottest September ever recorded; it came after the world’s ...

In countries like India, people, buildings and daily routines have evolved around recurring periods of extreme heat. Britain, ...