The ministry forecast that the water level will rise to 7.65 metre in Stung Treng province, 16.7 metre in Kratie province, and 9.9 metres in Kampong Cham province.
This phenomenon is due to changing weather conditions and the influence of a low-pressure system causing heavy rainfall in the Mekong River basin, it explained.
Although the water level has not yet reached an alarming rate, but some low-lying areas along the river might be flooded, the ministry said, calling on people to stay vigilant.