More than 125 million Americans are under the highest level of extreme heat alerts during a wave of above-average ...

An "extremely dangerous heat wave" is continuing to scorch a huge area of the eastern United States June 23, affecting tens ...

Tens of millions of Americans sweltered outside or sought air-conditioned refuge as an 'extremely dangerous' heat wave ...

The deadly heat wave across the eastern half of the country has made for some scary situations. Tens of millions in major ...

Several cities in the eastern United States have faced record high temperatures due to a climate phenomenon known as the ...

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

As sprawling heat dome spawns temperatures above 100 degrees Fahrenheit across the eastern United States, one New England ...

“Extremely dangerous heat persists across the Midwest and East Coast … affecting nearly half of the U.S. population at 161 ...

The grueling conditions could also be a preview of what’s to come next summer when the United States, Canada and Mexico host ...

A dangerous heat wave is currently baking the eastern two-thirds of the United States with extreme temperatures in the mid-to ...

Extreme humidity and triple-digit temperatures are affecting around 250 million people across the United States. Here's the ...

Heat waves are primarily caused by high-pressure systems that push warm air down onto an area and hold it there. During heat ...