How zoos in the hottest parts of the country keep animals healthy during extreme heat

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

Extreme heat spreading east l WNT
Extreme heat threatens Florida's reef, continental US's only coral reef system | Nightline
Activist Freya Aspinall on the importance of returning animals to the wild
Extreme heat heading to heartland, as last three weeks mark hottest ever recorded on Earth
The human toll of extreme heat | Nightline
Blistering heat continues across parts of the U.S.
Woman who received a uterus transplant is first to deliver a healthy baby outside a clinical trial
Last 16 days on planet have been hottest on record
July 4th marked the hottest day ever recorded, as intense heat continues across U.S.
Back to school: ABC News Live shares tips on preparing your kids for a healthy year | ABCNL