Cambodia is expected to experience moderate to heavy downpour from Wednesday to September 29, according to the Ministry of Water Resources and Meteorology.
The ministry said heavy rainfall will come due to a low-pressure system across northern Cambodia.
The central lowland and coastal areas will experience moderate to heavy rainfall, with mountainous areas getting moderate rainfall, it said.
The ministry also appealed to people to be wary of thunder, lightning and gusts, especially fishermen to keep their vigilance as large waves could occur between September 24 and 27.
Last week, Cambodia was hit by typhoon Noul.
According to the National Committee for Disaster Management on Monday, the impact of the typhoon Noul for the past few days caused devastating flooding across Preah Sihanouk, Pursat, Oddar Meanchey, Koh Kong and Pailin provinces.
At least 11 people were killed, including eight by lightning and three by flash floods, the report said, adding that 1,825 houses and 312 hectares of crops were inundated, with 475 people being evacuated to higher ground.