A fire fighter warns villagers of flood danger via a drone in Zhouzhuang Township, Xiuwu County of Jiaozuo, central China's Henan Province, July 20, 2021. Rivers in Jiaozuo have witnessed rising water level as continuous rainfalls recently hit the city. Local authorities have organized flood-control workers to patrol the city around the clock and eliminate hidden dangers to protect the safety of people's lives and property. (Xinhua/Li Jianan)