Extreme heat erodes body and brain, expert warns

An interview with explorer Christian Clot explains that extreme heat impairs physiology and cognitive function, with effects emerging when peak temperatures reach about 32°C and daily averages stay around 24°C. The piece cites France’s 2003 heatwave with roughly 15,000 excess deaths and notes a late June heatwave estimated to cause about 5,000 additional deaths, with global heat-related mortality around 500,000 annually, underscoring the need to prepare for increasingly frequent heatwaves.