Tubers float down the Salt River on Saturday, June 29, 2013, in 

Tubers float down the Salt River on Saturday, June 29, 2013, in Phoenix. Excessive heat warnings will continue for much of the Desert Southwest as building high pressure triggers major warming in eastern California, Nevada, and Arizona. Temperature's are expected to get as high as 118 degrees. (AP Photo/Rick Scuteri)
Associated Press
Tubers float down the Salt River on Saturday, June 29, 2013, in Phoenix. Excessive heat warnings will continue for much of the Desert Southwest as building high pressure triggers major warming in eastern California, Nevada, and Arizona. Temperature's are expected to get as high as 118 degrees. (AP Photo/Rick Scuteri)
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