Photo Gallery: Heat Wave Sweeps Across The Nation July 20, 20113:20 PM ET Hide caption Hanna Hammond, 4, plays at the public sprayground at Memorial Park on Thursday in Oklahoma City, Okla. Previous Next Brett Deering/Getty Images Hide caption Bathers beat the midday heat at the Devil's Pool in Wissahickon Valley Park on Wednesday in Philadelphia. Previous Next Matt Rourke/AP Hide caption Angela Provis and her daughter Olivia Provis, 6, shield themselves from the afternoon sun while waiting for a bus Thursday in St. Louis. Previous Next Jeff Roberson/AP Hide caption Jayson Hamler runs under a spray of water outside a school on Wednesday in Milwaukee. Previous Next Morry Gash/AP Hide caption A member of the Salina South High School soccer team works out early Wednesday in Salina, Kan. Previous Next Tom Dorsey/AP Hide caption A dog takes an early morning dip on the shore of Lake Michigan on Wednesday in Chicago. Previous Next Kiichiro Sato/AP Hide caption Franklin, Ind., Mayor Fred Paris pours one of 250 bags of ice into the Franklin Memorial Swimming Pool on Thursday. Previous Next Darron Cummings/AP Hide caption Stephanie Gracia (center) watches as her children and their friends cool off in an inflatable pool outside their apartment Thursday in Brooklyn. Previous Next Bebeto Matthews/AP Hide caption Lillie Walker, 90, accepts bottles of cold water on Monday in Jennings, Mo. Previous Next Jeff Roberson/AP Hide caption Malee, a 3-month-old Asian elephant, sprays herself with water in her wading pool at the Oklahoma City Zoo on Monday. Previous Next Sue Ogrocki/AP Hide caption Children keep cool in a swimming pool in right field at Canal Park in Akron, Ohio, on Wednesday. Previous Next Mark Duncan/AP Hide caption A heat wave has brought temperatures well into the 90s and even beyond 100 for half the country, as seen in this heat map from NOAA. Previous Next 1 of 12 View slideshow i Facebook Twitter Google+ Email We no longer support commenting on NPR.org stories, but you can find us every day on Facebook, Twitter, email, and many other platforms. Learn more or contact us.