Extreme heat heading to heartland, as last three weeks mark hottest ever recorded on Earth
July 4th marked the hottest day ever recorded, as intense heat continues across U.S.
55 million Americans under heat alerts as hottest weather of the season spreads east
Blistering heat continues across parts of the U.S.
Blistering heat continues across parts of the U.S.
Heat waves and hazardous air quality continues across parts of US
Severe storms in parts of the country
Extreme heat threatens Florida's reef, continental US's only coral reef system | Nightline
Robot mimics human reactions to extreme heat | GMA
Pennsylvania flooding turns deadly, while extreme heat grips West and south l GMA
