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

Most of Long Island is under an extreme heat warning Tuesday as temperatures are expected to reach dangerous heat index ...

The National Weather Service has issued an extreme heat warning for the most-populated areas of Maine due to a combination of ...

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

With the extreme heat warning for York County about to expire, residents will have to deal with the potential for some serious thunderstorms.

Cook County and Chicago are under an Extreme Heat Warning starting Saturday morning, a Heat Advisory has been issued for the ...

With New York under an extreme heat warning, the Mets took extra precautions Monday. Those included a later report time for ...