AP PHOTOS: Images of the western US heat wave

Sunday - 6/30/2013, 5:22am EDT

The Associated Press

A heat wave across the western U.S. has been 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:

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