A heat wave is an extended period of extreme heat ... and even life-threatening for people who don't take the proper precautions.

Hot and cold extremes are expected this week in the U.S., with a heat wave moving east that is threatening the states with the hottest June on record. Officials warned residents from coast to ...

Officials in Washington DC have urged residents to take precautions due to poor air quality. More than 170 million Americans are under either heat or air quality alerts as wildfire smoke and ...