As wide swaths of the U.S. deal with extreme heat this summer, zoos across the country are taking various steps to mitigate its impact on their animals. "Days when it's 99 degrees, it makes our job ...

Many of the Phoenix Zoo’s 3,000 animals are used to hot weather. Still, with the city reaching a record 21 consecutive days of temperatures at 110 F or higher, zookeepers are having to get creative.