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Eric Varone, right, takes a picture as Floriane Golay, of Switzerland watches, in Death Vally National Park Friday, June 28, 2013 in Badwater, Calif. Excessive heat warnings will continue for much of the Desert Southwest as building high pressure triggers major warming in eastern California, Nevada, and Arizona.
A high pressure system hanging over the West this weekend is expected to bring temperatures that are extreme even in a region used to baking during the summer. The National Weather Service called for 118 in Phoenix, and 117 in Las Vegas on Sunday—a mark reached only twice in Sin City.

Here are pictures of the heat wave:

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Runners take advantage of lower temperatures at sunrise, Thursday, June 27, 2013 in Mesa, Ariz. Excessive heat warnings will continue for much of the
Runners take advantage of lower temperatures at sunrise, Thursday, June 27, 2013 in Mesa, Ariz. Excessive heat warnings will continue for much of the Desert Southwest as building high pressure triggers major warming in eastern California, Nevada, and Arizona. Dangerously hot temperatures are expected across the Arizona deserts throughout the week with a high of 118 by Friday. ((AP Photo/Matt York))