At 1 p.m. on Tuesday, the National Weather Service released a heat advisory valid from Thursday 11 a.m. until Friday 8 p.m.

The National Weather Service already has issued extreme heat warnings, watches and advisories across a swath of the Midwest ...

Michigan is heating up this week. Two southwest counties are already under a heat advisory because of dangerous heat index ...

EDT the National Weather Service released a heat advisory valid for Wednesday between 2 p.m. EDT and 8 p.m. EDT for Cass and ...

A heat advisory was released by the National Weather Service on Monday at 12:23 a.m. valid between 10 a.m. and 6 p.m. for ...

The National Weather Service released a heat advisory at 10:42 p.m. on Monday in effect until Tuesday at 9 p.m. for Blount, ...

The heat index considers the actual temperature and amount of moisture in the air using the dew point or relative humidity.

The National Weather Service office in Mobile, Alabama, issued a heat advisory in Escambia, Santa Rosa and Okaloosa counties ...

A heat advisory for Florida's Treasure Coast is in effect from noon through 6 p.m., with heat index values from 109 to 112 ...

A heat advisory has been issued for Miami-Dade and Broward counties for Monday and will be in effect noon to 6 p.m. South ...

Hot and humid conditions continue for Central Florida on Monday with the region under a heat advisory from noon-6 p.m., ...

On Sunday at 1:18 p.m. the NWS Greenville-Spartanburg SC released a heat advisory valid for Monday between noon and 8 p.m.