A widespread and dangerous heat wave is building across the U.S., with triple-digit highs expected in the Southwest and Great ...

Most of the U.S. is about to swelter under an unusually large, strong and long-lasting heat dome. The heat wave is set to ...

A heat dome will bring dangerously hot and humid conditions to the eastern half of the United States next week in the region’s most widespread heat wave of the summer so far.

Understand the risks associated with extreme heat and what to do when you’re facing down a heat wave with this guide based on ...

A dangerous heat wave​ arrives in Philadelphia and the surrounding suburbs this week, where each day temps could surpass 100 ...

Although the deadly early July heat wave has shrunk significantly, dangerous heat still persists across portions of the South ...

Man, it's a hot one! Don't go out in this summer's heat wave before you arm yourself with these tips and a really big water ...

A National Weather Service heat advisory will remain in effect until 9 p.m. Thursday for communities in the San Gabriel ...

One region in the United States, somewhat like Europe, is less equipped to deal with extreme heat than the rest of the country.

Don't stick your phone in the fridge. Do sign up for emergency text alerts.

The PJM Interconnection, the grid serving 67 million people across parts of 13 mid-Atlantic states, tracked 162 gigawatts of ...