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 ...

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 ...

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 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, ...

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

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

An Extreme Heat Warning is in effect for most of Southern New England except the Berkshires. Heat impacts are expected Sunday ...

Other areas of Maine, including the Midcoast and Downeast regions, are under heat advisory until 8 p.m. Tuesday.

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