Add Yahoo as a preferred source to see more of our stories on Google. Extreme heat warnings and advisories have been issued to more than 130 million people across the eastern U.S. this week. (National ...

Dangerous heat is gripping much of the eastern half of the country to start the week — but it will loosen that hold significantly by the weekend. About 200 million people are under some sort of heat ...

A heat wave is impacting the Pacific Northwest, with temperatures in the upper 80s to over 100 degrees in Washington. Warm nights are a concern as they prevent the body from recovering from daytime ...