AAA Jun. 29, 2013 4:02 PM ET AP PHOTOS: Images of the western US heat wave By The Associated Press By The Associated Press Kayla Holdridge, 6, of Eagle, is sprayed with water at Settlers Park Friday, June 28, 2013 in Meridian, Idaho. Many people looked for ways to beat the heat as temperatures in the Treasure Valley soared into the triple digits. (AP Photo/The Idaho Press-Tribune, Adam Eschbach) MANDATORY CREDIT Malik Coleman, 6, plays in the water spray grounds at James Wiley Park near downtown on Friday, June 28, 2013, in Houston. AP Photo/Houston Chronicle, Mayra Beltran Chris Jolley, right, of Scottsdale, runs his dog Logan through sprinklers at a local park on Saturday, June 29, 2013, in Scottsdale. Temperature's are expected to get as high as 118 degrees. AP Photo/Rick Scuteri 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.