Citizens and tourists have fun at a water amusement park in Chongqing, southwest China, July 15, 2018. An orange alert for high temperatures was issued by Chongqing meteorological observatory on Sunday. (Xinhua/Wang Quanchao)

Citizens and tourists have fun at a water amusement park in Chongqing, southwest China, July 15, 2018. An orange alert for high temperatures was issued by Chongqing meteorological observatory on Sunday. (Xinhua/Wang Quanchao)

Citizens and tourists have fun at a water amusement park in Chongqing, southwest China, July 15, 2018. An orange alert for high temperatures was issued by Chongqing meteorological observatory on Sunday. (Xinhua/Wang Quanchao)