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

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

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

Heat dome will cause dangerously high temperatures in many places across the country this weekend, especially the Midwest and ...

A significant and intense heat wave is set to engulf the central and eastern United States, delivering the highest ...

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

Much of the country is facing brutal, potentially deadly heat. The reasons for such extreme events are not complicated.

Maps show where extreme humidity and 90- or 100-degree temperatures will affect about 255 million people across the United ...

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

A widespread heat wave is poised to engulf the central and eastern United States, potentially impacting 170 million people.

Just in time for the start of summer on June 20, a heat wave is expected to scorch a large section of the United States, ...

The highest temperatures this year will combine with increasing humidity and intense summer sunshine to create dangerous, ...