In a twenty-hour period on July 21, 2012, a flash flood hit the city of Beijing in the People's Republic of China.

[3] Fangshan District was the most heavily affected area of Beijing, located in the southwest, which received a record-setting 460 mm (18 in) of rain, while on average the city received 170 mm (6.7 in) during the same period, the highest recorded since 1951.

The Juma River flooded its banks and reached a flow rate of 2,500 m3 (88,000 cu ft) per second.

A woman in Fangshan reported the river rose 1.3 metres on her home in approximately ten minutes.

[4] At Beijing Capital International Airport, the floods resulted in the cancellation of over 500 flights, stranding 80,000 travellers.