At Beijing Olympic Park, tourists use umbrellas and towels to avoid heatstroke on July 12. [Photo/China Daily]

Farmers use ice to keep vegetables fresh at a market in Beijing on July 13. [Photo/China Daily]

Despite high temperatures, building workers continue with their job in Guizhou province on July 13. [Photo/China Daily]

A half-naked worker transports boxes of vegetables in Beijing on July 13.[Photo/China Daily]

A child enters a watermelon-eating competition at Handan, Hebei province, on July 13. [Photo/China Daily]

A female driver dons an anti-ultraviolet shirt in Yangzhou, Jiangsu province, on July 13. [Photo/China Daily]

A gauge indicates that the temperature has soared above 40 degrees Celsius at Hengyang, Hunan province. on July 13. [Photo/China Daily]

A kid plays with water in Beijing on July 13. [Photo/China Daily]

A chimpanzee enjoys cold drinks at a zoo in Shenyang on July 13. [Photo/China Daily]

Squirrel monkeys dine on worms placed on a brick of ice at a zoo in Shenyang on July 13. [Photo/China Daily]

People are well-protected against the heat in Yangzhou, Jiangsu province, on July 13. [Photo/China Daily]

A family of three rides a tricycle amid a heat wave at Beijing on July 13. [Photo/China Daily]