More triple-digit temperatures baked parts of Los Angeles and Orange counties on Friday as a late-summer heat wave promises to stretch into the weekend, prompting an extension of some heat warnings ...

It might feel unseasonably hot where you are right now. That's thanks in part to a heat wave in the Pacific Ocean.

Israeli children cooled off in a water fountain near Jerusalem's Old City on Aug. 13, as temperatures in Jerusalem reached 102 degrees, during a scorching heat wave. Photo by Debbie Hill/ UPI Aug. 25 ...

Every summer, heat waves affect millions of people around the world. The World Meteorological Organization reported that at least 10 countries experienced temperatures higher than 50ºC in 2023–2024.

While scientists have spent decades covering how extreme heat and cold lead to death, new research using data from California emergency departments shows that the heat may be making us sicker too. A ...

A new study finds dozens of heat waves would be "virtually impossible" without the activity of major fossil fuel producers, ...

Scientists expect species that rely on cold water, including trout, to increasingly struggle as streams heat up. (JMichl / iStockphoto via Getty Images) U.S. rivers are running hot. A new analysis of ...

There used to be places to go to escape the heat on our summer vacations. You could venture to Norway to see its world-famous fjords. A trip to Scotland for a temperate round of golf. Visiting ...