The heat index could reach more than 100 degrees on Monday and Tuesday, according to the National Weather Service.

Nashville's NWS issues a Heat Advisory warning of extreme temperatures and high humidity until Wednesday evening.

An intense heat wave threatens millions of people across the Southeast with temperatures reaching 115 degrees through midweek ...

As dangerous highs continue in central North Carolina, and heat index temperatures climb past 110 degrees all weekend, the ...

The National Weather Service issued heat advisories for a large swath of the East Coast from central Florida to Virginia ...

The National Weather Service in Paducah has extended its dangerous heat warning, now forecasting extreme heat conditions to ...

A double whammy of wildfire smoke blowing into the city and an incoming heat wave has made the city's air dangerous for ...

Orlando heat wave triggers Heat Advisory with temperatures reaching mid to upper 90's and heat index up to 110°F.

Per the NWS Wilmington office, which covers Central and Southwest Ohio, the heat index — the measure of how hot it feels — ...

Pennsylvania is expected to have 37 days of 90-degree temperatures in a year by mid-century, up from an average of 5.

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.