As a heat wave hits multiple U.S. states, some areas are have been placed under extreme heat watches and warnings.

An "extreme heat warning" has officially been issued for nine major U.S. cities on Monday, June 23. The National Weather ...

Philadelphia is under an extreme heat warning with heat index values up to 105 degrees, advising residents to stay cool and ...

The National Weather Service has extended the heat advisory for central Ohio until June 27. COTA has extended free rides as a ...

An "extreme" heat warning has been issued for 16 U.S. states on Tuesday morning. The National Weather Service is warning 16 U ...

The National Weather Service is cautioning Tri-State residents about extreme heat early this week with heat indices that ...

The NWS has issued an extreme heat warning for central North Carolina, with heat index values possibly reaching 112 degrees, ...

Harford County is opening 11 cooling centers for those looking for a reprieve from the extreme heat in Maryland this week.

An extreme heat warning was issued by the National Weather Service in Mount Holly at 11:03 a.m. on Monday, June 23.

Tuesday could bring a higher heat index, with real-feel temperatures up to 111 degrees. Here's when the region could see ...

It'll be very hot, but what conditions are required for the extreme heat warning that much of New Hampshire is under? Matt Hoenig breaks it all down.

An extreme heat warning was issued by the National Weather Service in Mount Holly at 11:03 a.m. on Monday, June 23. This warning applies to New Castle, Gloucester, Camden and northwestern ...