Photos: The western U.S. heat wave
Published: June 29, 2013 02:32PM
Updated: June 29, 2013 06:31PM
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Ten-year-old Easton Martin, of Mesa, Ariz., stops to cool off in a misting fan while walking along The Strip with his family, Friday, June 28, 2013 in Las Vegas. A blazing heat wave expected to send the mercury soaring to nearly 120 degrees in Phoenix and Las Vegas settled over the West on Friday, threatening to ground airliners and raising fears that people and pets will get burned on the scalding pavement. (AP Photo/Julie Jacobson)

A heat wave across the western U.S. was so punishing that rangers took up positions at trailheads at Lake Mead in Nevada to persuade people not to hike. Zookeepers in Phoenix hosed down the elephants and fed tigers frozen fish snacks. Dogs were at risk of burning their paws on scorched pavement, and airlines kept close watch on the heat for fear that it could cause flights to be delayed.

Here are pictures of the heat wave: