More than 50,000 people have been moved from their homes in on China's border with North Korea, after the Yalu river burst its banks in heavy rain.
Some 200 houses have been destroyed in the city of Dandong, and three people are reported missing, state media says.
Flooding has also been reported across the border, with the North Korean city of Sinuiju severely affected.
More than 1,500 people have died in China in recent months during one of the country's wettest-ever summers.
In China the latest flooding comes after the deaths of more than 700 people in a landslide triggered by heavy rains in Zhouqu county, Gansu last week.
China's state weather bureau is forecasting more heavy rain throughout the weekend.