The record-breaking rainfall follows another flooding event that hit China's Hebei province hard in late July. Torrential rain contributed to a landslide that left at least four people dead. That round of unusually heavy rain prompted flood warnings in Beijing, China's capital, and at least 11 provinces.

Hong Kong came to a standstill on Tuesday as torrential rain pounded the city for the second time in less than six hours, triggering a rare black rainstorm warning, paralysing public services and flooding key urban districts.