The government has ordered the Disaster Prevention chief and provincial governors to prepare teams and machines to reduce loss of life and damage to property.
The Meteorological Department warned the storm is strengthening as it barrels towards Vietnam and Laos and could become a typhoon by the time it reaches Thailand.
Residents in flood-prone areas have been warned to beware of flash-flooding.
Deputy Interior Minister Nipon Bunyamanee has ordered local authorities to monitor the situation closely and be ready to evacuate residents, especially those living in landslide and flood-prone areas.