Authorities relocated more than 4400 people on Monday as colossal rain continued to pound the suburban area of Miyun in Beijing causing flash floods and landslides, affected many villages, state broadcaster CCTV reported.
Images circulated on China's Wechat app showed areas of Miyun where cars and trucks were floating on a flooded road where water levels had risen so high that it had submerged part of a residential building.
Electricity cuts were also affecting more than 10,000 people in the area, CCTV said.
Northern China has seen record precipitation in recent years, exposing densely populated cities, including Beijing, to flood risks.
Some scientists link the increased rainfall in China's usually arid north to global warming.
China's Central Meteorological Observatory said heavy rain would continue to drench northern China during the next three days.
Beijing issued its highest-level flood alert on Monday, the official Xinhua news agency said.
The storms are part of the broader pattern of extreme weather across China due to the East Asian monsoon, which has caused disruptions in the world's second-largest economy.
Xiwanzi Village in Shicheng Town, near Miyun Reservoir, was severely affected, CCTV said on Monday with an additional 100 villagers transferred to a primary school for shelter.
It comes after the maximum flood peak flow into the Miyun reservoir reached a record high of 6550 cubic meters per second, Beijing authorities said on Sunday.
In neighbouring Shanxi province, videos from state media showed roads inundated by strong gushing currents and submerged vegetation including crops and trees.
Shaanxi province, home to China's historic city of Xian, also issued flash flood disaster risk warnings on Monday.
In Beijing's Pinggu District, two high-risk road sections had been sealed, authorities said.
China's Water Resources Ministry has issued targeted flood warnings to 11 provinces and regions, including Beijing and neighbouring Hebei.
Two were dead and two missing in Hebei province, CCTV said on Sunday morning.
Overnight rain dumped a record 145 millimetres an hour on Fuping in the industrial city of Baoding.
