As Glenn Frey sang about in the 80s, "The Heat is On" on Friday in the Philadelphia region. We'll be pushing 100 degrees, ...

High heat and humidity can also create instability in the air, which may result in some scattered severe thunderstorms Friday ...

At least 130 million people from Texas to Maine are under alert for dangerous heat and humidity over the next few days.

Much of the U.S. is under extreme heat warnings or advisories while New York, Philadelphia and Washington could feel like 100 degrees or more.

Death Valley is forecast to see heat index values peak at 101 Friday—swaths of the country are bracing for even warmer ...

If you factor in the heat index, cities like Houston, Memphis and Cleveland are as hot or hotter than Phoenix this week.

The heat index, or how it feels with humidity factored in, will rise into the triple digits for millions as the hot dome of ...

Erin Davis/Axios Visuals A heat dome is fueling high temps in the Philadelphia region that will stick around next week. The big picture: We have company. Dangerous heat levels are affecting nearly 85 ...

The cooler, less humid days to start the workweek in Delaware County were refreshing, but summer is returning with a jailbreak of heat on the East Coast, and 90s as far north as Portland, Maine, in ...

The National Weather Service has issued an Extreme Heat Warning for Philadelphia and the suburbs in Pennsylvania and New ...

A FIRST ALERT is in effect for the Philly region due to dangerous heat and severe storms on Friday, July 25. Get live updates ...

A First Alert will be in effect for the entire Philadelphia region on Friday, July 25 between Noon and 9 p.m. for severe ...