Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

A brutal heat wave across the eastern United States trapped millions of people in sweltering air this week with record-high ...

A heat wave is currently affecting about 160 million people, according to the National Weather Service. Here's which states ...

The National Weather Service will be investigating reports of a possible tornado hitting Largo, Florida, in the overnight ...

Stay safe in this sweltering heat, New Jersey. Here's the latest today, from heat maps, advisories and warnings, to when ...