Stifling heat wave

Salesman Hyper Rosado cools off in between customers during the afternoon heat at Appliances R Us, Thursday, July 18, 2013, in Philadelphia. An excessive heat warning is again in effect for the Philadelphia region with highs expected to head up to the high-90s (AP Photo/Matt Rourke) ORG XMIT: PAMR105

Deondria Harris, 8, of Milwaukee smiles as water is dumped on her head at the Splash Pad in Regner Park in West Bend, Wis on Thursday evening, July 18, 2013. The largest heat wave of the summer has stagnated over large regions, bringing sizzling temperatures and little hope of relief without rain, a growing possibility for some hard-hit areas as the weekend approaches. (AP Photo/West Bend Daily News, John Ehlke) ORG XMIT: WIWES104

Sonja Mason of St. Paul stands beneath one of the water falls at Upper Landing Park to stay cool, Thursday, July 18, 2013 in St. Paul, Minn. The largest heat wave of the summer has stagnated over large regions, bringing sizzling temperatures and little hope of relief without rain, a growing possibility for some hard-hit areas as the weekend approaches. (AP Photo/The Star Tribune, Elizabeth Flores) MANDATORY CREDIT; ST. PAUL PIONEER PRESS OUT; MAGS OUT; TWIN CITIES TV OUT ORG XMIT: MNMIT105

Nine-year-old William Williams, right, hugs his brother Xavier Robertson, 10, while waiting for the the Big Splash machine at the Como Town water park to dump water on them, in St. Paul, Minn. on Wednesday, July 17, 2013. Temperatures hit 92 degrees in St. Paul Wednesday, with a heat index of 97 degrees. (AP Photo/The St. Paul Pioneer Press, John Autey) MINNEAPOLIS STAR TRIBUNE OUT ORG XMIT: MNPAU101

Minneapolis United soccer team players receive a cool mist spray during a break in their game against a team from Canada in the Schwan's USA Cup International Youth Soccer Tournament Wednesday, July 17, 2013 in Blaine, Minn., as a heat wave continued, sending temperatures into the 90's with high humidity and a heat advisory for the Minneapolis-St. Paul area. The tournament showcases more than 950 teams and 14,000 soccer players from over 20 states and 16 countries. (AP Photo/Jim Mone) ORG XMIT: MP103

Five-year-old Claire Hayes knew how to beat the heat Wednesday July 17, 2013, as she played with the garden hose in her front yard with her twin brother in Alton, Ill. Cool water is a great way to minimize the effects of the July heat which reached the mid 90s Wednesday and is expected to reach the upper 90s Thursday and again on Friday before cooling back into the 80s for the weekend. ilaltap(AP Photo/The Telegraph,John Badman ) THE NEWS-DEMOCRAT AND THE POST-DISPATCH OUT ORG XMIT: ILALT102

Miguel Torres, 77, rides his electric wheelchair near a fountain at Pier A Park while escaping his hot apartment, Wednesday, July 17, 2013, in Hoboken, N.J. (AP Photo/Julio Cortez) ORG XMIT: NJJC108