The official heat wave will begin Monday after yesterday fell just below the 90-degree mark thanks to the spotty storms.

Tens of millions of people across the Midwest and East endured dangerously hot temperatures again on Sunday as a rare June ...

Tens of millions of people across the Midwest and East endured dangerously hot temperatures again Sunday as a sprawling June ...

Tens of millions of people across the Midwest and East endured dangerously hot temperatures again on Sunday as a sprawling June heat wave that gripped much of the U.S. was expected to last well into ...

A dangerous heat wave is expected for the Philly area this week evening, with temperatures reaching 100 degrees. Here's ...

Record-smashing daytime temperatures near 100 degrees are expected for millions from the Plains to the East Coast this week, while nighttime temperatures may stay above 80 in some metropolitan areas.

Extreme humidity and heat will affect about 265 million people across the country this week. Maps show where and when to ...

An expansive heat dome that has already broken dozens of record-high temperatures on Friday and Saturday will continue Sunday ...