The planet has been shattering heat records for the past two years. That was expected to ease in January—and the fact that it didn't has climate researchers worried.

Firefighters came to help from all over California; from Texas, Oregon and Arizona; from tribal reservations and even Mexico and Canada. We should collaborate to prevent disasters, too.

Adelaide was ranked as the hottest city in the world today as the entire state was smothered by a low to severe-intensity ...