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's weather bureau said its highest "black" rainstorm warning would remain in place until 11 a.m. on Tuesday, as heavy rains lashed the Asian financial hub, closing hospital wards, schools, and the jurisdiction's courts and register offices.