Photo taken on July 20, 2013 shows the floodwater gushing from the sluices of the Gezhou Dam in Yichang, Central China's Hubei province. This year's highest flood peak of Yangtze River is estimated to arrive at Three Gorges Reservoir on July 21, with a predicted inflow of 48,000 cubic meters per second. [Photo/Xinhua] 

Local residents participate in a water fight at People Square in Shanghai July 21, 2013. The temperature in Shanghai rose to 36 degrees Celsius (97 degrees Fahrenheit) on Sunday, reported local news. [Photo/Agencies]