A sign indicates water temperature at 31 celsius during the 25 km Open Water event at the FINA Swimming World Championships at Jinshan Beach in Shanghai, China, Saturday, July 23, 2011. The men's and ... more 
A sign indicates water temperature at 31 celsius during the 25 km Open Water event at the FINA Swimming World Championships at Jinshan Beach in Shanghai, China, Saturday, July 23, 2011. The men's and women's races were moved up two hours to a 6 a.m. start in an attempt to stage them in cooler conditions. But the water was already 30.5 Celsius (87 Fahrenheit), just under the suggested "unsafe" point of 31C (88F) degrees. (AP Photo/Ng Han Guan) less 
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Associated Press | Photo By Ng Han Guan
Sat, Jul 23, 2011 3:32 AM EDT