Sweat beads on Tiger Woods' face as he waits to putt on the practice green as he prepares for the 89th PGA Golf Championship at the Southern Hills Country Club in Tulsa, Okla., Wednesday, Aug. 8, 2007. Temperatures are expected to remain in the high nineties during the championship which begins on Thursday, Aug. 9.
Credit: AP Photo/Jeff Roberson
Five-year-old Zach Hardy leaps up to catch the water mist from a cooling fan at the 89th PGA Golf Championship at the Southern Hills Country Club in Tulsa, Okla., Wednesday, Aug. 8, 2007. Temperatures are expected to remain in the high nineties during the championship which begins on Thursday, Aug. 9.
Credit: AP Photo/Morry Gash
Noah Florimon, 6, finds some relief from the heat in a fountain in front of the Washington Monument Tuesday, Aug. 7, 2007, in Washington. Temperatures in the Washington metro area were expected to reach 100 degrees with high humidity.
Credit: KAREN BLEIER/AFP/Getty Images
A boy plays in a fountain to cool down on Tuesday, Aug. 7, 2007, in Nanjing, Jiangsu Province, China. Nanjing is known as one of the 'Three Furnaces' of China for its hot summer weather. A heat wave gripped most regions of China, with temperatures in some areas soaring past 100 degrees.
Credit: GETTY IMAGES/China Photos
Two boys play with sandy mud on a beach of the Danube River in Belgrade, July 20, 2007, as a heat wave hit Serbia with temperatures rising close to 40 degrees Celsius (104 degrees Fahrenheit) Friday.
Credit: ANDREJ ISAKOVIC/AFP/Getty Images
Geese walk near the only remaining wet patch on a dried out lake bottom, on the outskirts of Bucharest, Romania, Friday, July 20, 2007. Temperatures went above 42 degrees Celsius (108 degrees Farenheit) in many areas of Romania, where authorities say five people died over the past few days from heat related problems, raising the death toll from the hea to 34.
Credit: AP Photo/Vadim Ghirda
A Filipino boy jumps from a water fountain in a suburban Manila park on Thursday, July 19, 2007. Many impoverished Filipino children find relief from the tropical heat in the fetid waters of Manila Bay and decorative public fountains along key thoroughfares because their families could not afford expensive beach resorts and playgrounds.
Credit: AP Photo/Aaron Favila
A vendor sells ice, which sells for the equvalent of $5 in a market in the Shiite enclave of Sadr City in Baghdad, Iraq, Thursday, July 19, 2007. With Baghdad's spotty power grid, Iraqis face midsummer temperatures that peaked at 41 degrees Celsius (106 degrees Fahrenheit) with little or no access to refrigeration for their food and medicine.
Credit: AP Photo/Karim Kadim
Two little monkeys play in a pool in Rome's BioParco zoo, Wednesday, July 18, 2007, as temperatures reached 38 degrees Celsius (100 degrees Fahrenheit) with hot winds and high humidity gripping most of the country. Forecasts say the temperatures will stay the same in coming days, and electricity demand is soaring.
Credit: AP Photo/Alessandra Tarantino
A young man dives into the Treska river near village of Matka just west of Macedonia's capital Skopje, on Thursday, July 19, 2007. Macedonian government declared a state of emergency as temperatures reached 41 degrees Celsius (105.8 degrees Fahrenheit) and were predicted to rise further.
Credit: AP Photo/Boris Grdanoski
A Bosnian man refreshes his face with water at a fountain in Sarajevo, Wednesday, July 18, 2007. The second heat wave this summer is causing water supply shortages in many villages across Bosnia-Herzegovina. Authorities are set to declare a state of emergency due to extreme heat that has overwhelmed the Balkan state in the past few days.
Credit: AP Photo/Amel Emric
Three boys play in the river Drevnice in Zlin, Czech Republic, on Tuesday, July 17, 2007, when temperatures hit 37 degrees Celsius (99 degrees Fahrenheit). Cooler temperatures were expected across the country thanks to a cold front in west Bohemia.
Credit: AP Photo/CTK, Zdenek Nemec
Rhinoceroses are given a bath by keeper Arpad Csergoe to cool them in the Nyiregyhaza Animal Park in Nyiregyhaza, Hungary, Monday, July 16, 2007, as Hungary was hit by a heat wave with temperatures up to 37 degrees Celsius (99 degrees Fahrenheit). Much of Europe remains in the grip of a sweltering heatwave.
Credit: AP Photo/MTI, Istvan Kiss
A boy takes a shower during the summer heat at a swimming pool in Berlin on Monday, July 16, 2007. Temperatures rose up to 33 degrees Celsius (91 degrees Fahrenheit) in Germany. A heat-wave sweeping central and southeastern Europe has killed at least 13 people this week, with soaring temperatures causing forest fires and damaging crops.
Credit: AP Photo/Markus Schreiber