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 ...

Several states are expecting extreme heat, with the heat index, or feels-like temperature, surging past 100 degrees.

Maps show where extreme humidity and 90- or 100-degree temperatures will affect about 255 million people across the United ...

The NWS heat index maps show exactly where the worst of the heat is ... The EPA also argues that during the past 30 years, heat took more lives than other types of extreme weather events like floods, ...

Temperatures in Florida, Georgia, Arkansas, Tennessee, Kentucky, Indiana, Illinois, North Carolina, and Virginia could feel ...

These map comparisons may incorrectly lead people to believe that it is the reporting that is getting more extreme, not the weather. But, in fact, 19 of the 20 warmest years in recorded history ...