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

A heat warning (sometimes called an excessive heat warning) is the most serious alert. It’s issued when dangerously high heat ...

More severe weather is on the way to join the heat wave on Sunday, including a thunderstorm risk and a tornado watch for ...

Hundreds of people working or playing outside – even those who seem healthy – succumb to heat-related illnesses each year.

Clusters of strong thunderstorms are expected to sweep across eastern Pennsylvania and New Jersey late Thursday afternoon and ...

A tornado warning was issued for West Central Cass and East Central Barnes counties until nearly 11:30 p.m., according to the ...

These conditions are perfect for a tornado, and when meteorologists detect them, will issue a watch. When a warning is issued, take action. This means tornado conditions are imminent and have been ...

The forecast calls for temperatures in the upper 90s, and plenty of humidity to make it feel hotter. The combination of heat ...

A Tornado Watch is in effect, as is a Flood Watch, for large swaths of the Chicago area Wednesday. The possibility of ...

On Monday at 4:27 p.m. the National Weather Service issued an updated flood watch in effect until Tuesday at 2 a.m. for ...