Tropical storm Sonca will bring average to heavy rain over the country from today until Thursday as it crosses from China to the Mekong river basin.
The Ministry of Water Resources and Meteorology said Sonca developed in the South China Sea and would travel into the Gulf of Tonkin off Vietnam today. Fifteen provinces in the central lowlands and highland areas would be affected by heavy rain, the ministry said.
These were Prey Veng, Svay Rieng, Kampong Cham, Tbong Khmum, Kratie, Ratanakkiri, Mondulkiri, Stung Treng, Preah Vihear, Oddor Meanchey, Kampong Thom, Siem Reap, Banteay Meanchey, Battambang and Pailin.
Heavy rain would bring wind and high waves to coastal areas and cause the level of the Mekong to rise, the ministry said.
“Please, everyone, especially fishermen and passengers at sea, be careful to avoid accidents,” it added.
Keo Vy, a spokesman for the National Committee for Disaster Management, said rises in Mekong water levels would cause some flooding but this would not be serious.
Mr Vy said Mekong levels had risen twice this month but did not cause serious floods.
Officials said 113 rainstorms in more than 20 provinces damaged 2,763 houses in the first half of the year, destroying 351 homes. The roofs of 25 school buildings were also blown off.
Rainstorms killed three people and injured 47.