Park Record Media Center

A large crowd of people gathers at Santa Monica Beach in Santa Monica, California, June 30, 2011, amid the heat wave gripping the southwest US. JONATHAN ALCORN/AFP/Getty Images ( 521034455 )

People walk through an area of Death Valley known as the Devils Golf Course in 116-degree and rising temperatures as a heat wave spreads across the American West on June 30, 2013 in Death Valley National Park, California. (Photo by David McNew/Getty Images) ( 171997685 )

Randy Kern (L) and John Rice dress as Star Wars characters for their own annual snapshot tradition near an unofficial thermometer at Furnace Creek Visitors Center reading of 131 degrees, believed by officials to be about three degrees on the high side, as a heat wave spreads across the American West (Photo by David McNew/Getty Images) ( 172021439 )

Death Valley National Park employee Anna Gilay makes her usual seven-mile morning run at 6:55 a.m. with the unofficial temperature already reaching 103 degrees as a heat wave spreads across the American West on June 30, 2013 in Death Valley National Park, California. (Photo by David McNew/Getty Images) ( 171991942 )

People take advantage of a hot day by tubing on the Salt River near Mesa, Ariz., June 30, 2013. Much of the West has been in the mirth of an unrelenting heat wave. (Joshua Lott/The New York Times) ( SOUTHWEST HEAT 3 )

A man hands out advertisements for adult entertainment during a heat wave on the Las Vegas Strip on Sunday, June 30, 2013. (AP Photo/Las Vegas Review-Journal, Chase Stevens) ( West Heat Wave )

Elephants at Utah's Hogle Zoo are cooled off with a water hose Friday, June 28, 2013, in Salt Lake City. The heat wave that is gripping the western United States is one of the worst in years, with desert locations in the Southwest seeing temperatures approach 120 degrees. (AP Photo/Rick Bowmer) ( West Heat Wave )

Runner Craig Parrish of Phoenix, Arizona runs on the salt flat at Badwater Basin, the lowest point in the nation at 282 feet below sea level, during the hottest time of the day where, according to park personnel, temperatures would have exceeded 128 degrees as a heat wave spreads across the American West on June 30, 2013 in Death Valley National Park, California. (Photo by David McNew/Getty Images) ( 172021438 )

A mirage makes a car appear as if it's flying as a heat wave spreads across the American West on Sunday, June 30, 2013 in Death Valley National Park, California. Weather forecasters predict that high temperatures could reach 130 degrees on Monday, breaking the hottest-ever temperature for June of 128 degrees, set on June 29, 1994. (Photo by David McNew/Getty Images) ( 171997726 )

A Salt lake City fireman pours a cold bottle of water over the head of fireman Cary Turner after battling a house fire Thursday, June 26, 2013, in Salt lake City. Temperatures in Utah are approaching record highs and a heat advisory will be in effect for central and western parts of southern Utah through the weekend. The National Weather Service has issued a hazardous weather outlook for the western two-thirds of the state. (AP Photo/Rick Bowmer) ( West Heat Wave Photo Gallery )

People crowd Santa Monica Pier in Santa Monica, California, June 30, 2011, amid the heat wave gripping the southwest US. JONATHAN ALCORN/AFP/Getty Images ( 521034473 )

A man cools off in the ocean water at Santa Monica Beach in Santa Monica, California, June 30, 2011, as crowds escape the heat wave gripping the southwest US. JONATHAN ALCORN/AFP/Getty Images ( 521034434 )

Under the shade of an umbrella with temperatures already in triple digits by mid morning, tourists walk north along Las Vegas Boulevard toward The Strip, Sunday, June 30, 2013 in Las Vegas. Temperatures were on the rise again after the city reported a record overnight low of 89 degrees Sunday and forecasters predicting a high of 116. (AP Photo/Julie Jacobson) ( West Heat Wave )

Kevin Martin of Corona, California poses for a snapshot by an unofficial thermometer reading at Furnace Creek Visitor Center reading 128 degrees as a heat wave spreads across the American West on June 30, 2013 in Death Valley National Park, California. (Photo by David McNew/Getty Images) ( 171991573 )

Sunday league baseball player Alex Gallegos sips a cool drink at Sepulveda Basin Recreation Area on June 30, 2013 in Los Angeles amid a heat wave gripping the southwest US. JONATHAN ALCORN/AFP/Getty Images ( 521034539 )

A lifeguard points towards a swimmer at Santa Monica Beach in Santa Monica, California, June 30, 2011, amid the heat wave gripping the southwest US. JONATHAN ALCORN/AFP/Getty Images ( 521034580 )

Yoga enthusiasts participate in the Wanderlust In The City event at the Santa Monica pier in Santa Monica, California, June 30, 2011, amid the heat wave gripping the southwest US. JONATHAN ALCORN/AFP/Getty Images ( 521034691 )

A large crowd of people gather at Santa Monica Beach in Santa Monica, California, June 30, 2011, amid the heat wave gripping the southwest US. JONATHAN ALCORN/AFP/Getty Images ( 521034670 )

A parking lot at Santa Monica Beach is filled to capacity in Santa Monica, California, June 30, 2011, amid the heat wave gripping the southwest US. JONATHAN ALCORN/AFP/Getty Images ( 521034654 )

People sit under a parasol next to water fountains at the Music Center Plaza, as a potentially dangerous heat wave grips the western U.S., in Los Angeles, California, June 29, 2013. Dozens of people were treated for heat-related ailments, and cities and towns across the western United States took emergency measures to help residents cool off, as the region sweltered on Saturday in dangerous triple-digit temperatures. ( USA-WEATHER/HEAT )

The sun shines on people standing on the roof observation deck of the Griffith Observatory, as a potentially dangerous heat wave grips the western U.S., in Los Angeles, California, June 29, 2013. Dozens of people were treated for heat-related ailments, and cities and towns across the western United States took emergency measures to help residents cool off, as the region sweltered on Saturday in dangerous triple-digit temperatures. REUTERS/Jonathan Alcorn ( USA-WEATHER/HEAT )