BEIJING >> Chinese state media say a flash flood swept through a construction site and killed at least 21 workers in the northwestern Chinese province of Qinghai. Three workers are still missing.

The official Xinhua News Agency said Wednesday that rescuers are searching for those missing from Tuesday’s disaster in Wulan county, and that seven injured people had been sent to hospitals. The remote region lies amid high mountains, 2,500 kilometers (1,500 miles) west of Beijing.

Elsewhere in China, heavy flooding in the extreme south and northeast has left more than 200 dead or missing in recent days.

Flooding and landslides in southern China have been chiefly caused by rains brought by last week’s Typhoon Utor. Another storm was bearing down on Taiwan and expected to arrive on mainland China sometime Thursday.