Rescuers evacuate residents as heavy rain hits Bikou Township in Wenxian County, northwest China's Gansu Province, July 11, 2018. Many low-lying areas were inundated and traffic was disrupted in Wenxian county and neighboring areas. (Xinhua/Tian Chen)

Rescuers work on a flooded road as heavy rain hits Bikou Township in Wenxian County, northwest China's Gansu Province, July 11, 2018. Many low-lying areas were inundated and traffic was disrupted in Wenxian county and neighboring areas. (Xinhua/Tian Chen)

Rescuers evacuate residents as heavy rain hits Bikou Township in Wenxian County, northwest China's Gansu Province, July 11, 2018. Many low-lying areas were inundated and traffic was disrupted in Wenxian county and neighboring areas. (Xinhua/Tian Chen)

Rescuers evacuate residents as heavy rain hits Bikou Township in Wenxian County, northwest China's Gansu Province, July 11, 2018. Many low-lying areas were inundated and traffic was disrupted in Wenxian county and neighboring areas. (Xinhua/Tian Chen)

Rescuers evacuate residents as heavy rain hits Bikou Township in Wenxian County, northwest China's Gansu Province, July 11, 2018. Many low-lying areas were inundated and traffic was disrupted in Wenxian county and neighboring areas. (Xinhua/Tian Chen)