St. Louis, Chicago and Des Moines were among the cities that saw heat indexes hit triple digits on Saturday, with the East ...

Over 140 million Americans will be under the highest-level extreme heat alerts by Sunday during a wave of above-average ...

Temps may crack 100 for the first time in 13 years. The temperature made it to 91 on Saturday in Philly, and by the end of ...

A heat wave is moving in, with over 100 million people from the Midwest to the Northeast on alert for life-threatening heat ...

A dangerous, record-breaking heat wave will spread over the eastern United States and is expected to last several days.

States in the Midwest and Northeast could reach record temperatures in the coming days: Here’s where and when.

Widespread 90s, even perhaps a few 100s, will bake much of the eastern two-thirds of the country in a dangerous heat wave.

Many places around the country will experience their first significant heat of the year in the next few days. Here’s why it’s ...

The first heat wave of summer could bring punishing humidity and triple-digit temperatures to many states east of the Rocky ...

On the first official day of summer, millions of Americans already under heat warnings. These Oklahoma cities are hotter than ...

More than 37 million Americans are under heat advisories across the U.S., according to the National Weather Service. Here's ...