

Malee, a three-month old Asian elephant, cools off with a spray of water in her wading pool at the Oklahoma City Zoo in Oklahoma City on July 18. Much of the nation is in the grip of a broiling heat wave. Sue Ogrocki/AP
A child cools off in mist at the Henry Doorly Zoo in Omaha, Neb., on July 18. A heat wave is smothering the Midwest with a heat index well over 100 degrees in most places. Cooling centers are opening, and farmers are scrambling to prevent more livestock deaths. Nati Harnik/AP
A woman soaks her feet in the water as she and a man cool off during a prolonged heat wave in Dallas, Texas, on July 18. Mike Stone/Reuters
A boater seeks relief from high temperatures in Lake Calhoun in Minneapolis on July 18. A heat wave with oppressive temperatures and stifling humidity lingered and intensified in the middle part of the country and was expected to expand eastward as the week continued. Eric Miller/Reuters
Air conditioning is not the only way to beat the heat. A watermelon-flavored Italian Slush is served at Revere Beach in Revere, Mass., in 2005. John Nordell/Staff/File
We all scream for ice cream! Children eat ice cream during the celebrations for Border Guards Day in Kiev, Ukraine, on May 28. Gleb Garanich/Reuters
There's nothing like a cascade of water to cool you off. A man stands in a waterfall in Minsk, Belarus, on July 15. A heat wave hit the city, with temperatures going higher than 86 F. Sergei Grits/AP
A swimming hole is one of summer's pleasures. Justin Dahl lets go of a rope swing to fall into the cool lake below near the Winona Municipal Airport in Goodview, Minn., on July 1. Andrew Link/The Winona Daily News/AP
Coolness is where you find it. Ron Krajewski pushes his son Ron Jr. through a water sprinkler to cool off from the simmering heat at the National Mall in Washington on June 8. Manuel Balce Ceneta/AP
A mini fan for a St. Louis Cardinals fan: In a heat index of 110 degrees, a man tries to stay cool at a baseball game between the St. Louis Cardinals and the Arizona Diamondbacks in St. Louis, Mo., on July 10. Tom Gannam/AP
Keeping cool: A patron waiting in line at Pete's Fish and Chips restaurant stands near the misting machine as temperatures after sunset topped 105 degrees in Phoenix on June 23. Ross D. Franklin/AP
Water parks are a logical place to go when the temperature rises. A boy cools off in a fountain in the village of Babin Most near Kosovo's capital Pristina on July 11. Visar Kryeziu/AP
It's great when a city gives people a place to escape the heat. Locals soak in the fountains of Royal Festival Hall on a hot day in London on June 27. Olivia Harris/Reuters
This is something you wouldn't want to do in the winter. Cranberry township volunteer firefighter Chuck Dohn aims his fire hose as he practices with a fellow fireman at their annual 'Battle of the Barrel' at the Community Days celebration to hone skills and build camaraderie in Cranberry, Pa., on July 9. Keith Srakocic/AP
Sometimes a city fountain is the best way to go. Arthur Davis (r.) and his brother Carter cool off in New York's Washington Square fountain on July 5. Mary Altaffer/AP
Slip slidin' away: With temperatures hitting a record 118 degrees, Nazerei Montoya (r.) and her younger brother, Nickolas Herrera, play on a water slide fed with a garden hose in front of their apartment in Phoenix on July 3. David Wallace/The Arizona Republic/AP