Monsoon Flooding in Thailand
Heavy rain and potential flash floods are forecast for the Northeast, Greater Bangkok, and other regions through Friday, September 11. Expats should take precautions, especially in low-lying areas, and monitor local alerts as 51 provinces remain under a flood and runoff warning until September 2.
How this developed
Heavy rain and flood risk forecast for Northeast and Bangkok through Friday
The Meteorological Department warns of heavy rain from Sunday through Friday, with possible flash flooding in the Northeast, Greater Bangkok, and other regions. Expats should take precautions, especially in low-lying areas.
51-province flood warning Aug 29–Sep 2
Thailand's Department of Disaster Prevention and Mitigation warns of flash floods and runoff in 51 provinces from August 29 to September 2, with high-risk areas in the North, Northeast, and East. Expats in affected provinces should monitor local alerts and avoid flood-prone zones.
Nan floods kill two; army deployed for recovery
Flooding in Nan province has caused two deaths, with 700 soldiers deployed to clear mud and reopen roads. The disaster is localized to a remote area with no significant expat presence.
Flood risk warning for 3,900 sq km in northern Thailand
GISTDA warns of very high flood risk across over 3,900 square kilometers in Sukhothai, Phitsanulok, and neighboring provinces. Expats in those areas should monitor the situation closely.
Flood and landslide warnings for northern provinces
The Thai Meteorological Department warns of heavy rain, flash floods, and landslides in northern and upper northeastern provinces until Friday, with critical flooding already reported in Nan. Expats should avoid flood-prone roads and low-lying areas through the warning period.
Mekong River flood risk rises in northeastern Thailand
The Mekong River has risen above 12 metres in Nakhon Phanom and continues to surge in Mukdahan and Ubon Ratchathani due to persistent rain. Officials have installed pumps and express confidence that downtown Nakhon Phanom will not flood due to floodwalls, but some farmland in three districts has been flooded.
Heavy rain and flood risk across North, Northeast, East Thailand
Thailand's Meteorological Department warns of heavy to very heavy rain across the North, Northeast, and East over the next 24 hours, with risks of flash floods and forest runoff. Boaters in the upper Andaman Sea and upper Gulf should exercise caution; small boats should stay ashore.
Flash flood warnings for 20 Thai provinces through Aug 4
ONWR warned 20 provinces across the North, Northeast, East, and South of possible flash floods, landslides, and river overflows from Aug 2–4 due to heavy rain. Chiang Mai, Phuket, Udon Thani, and other areas expats may travel to are included. Residents should monitor flood risks and avoid stormy areas.
Chiang Rai flooding hits homes as rivers overflow
Heavy rain has caused the Lao and Korn rivers in Chiang Rai to overflow, flooding at least 50 homes. Authorities warn water levels could rise further; expats in or traveling to Chiang Rai should monitor conditions and avoid affected areas.
15 Thai provinces warned of landslides, forest runoff
The Department of Mineral Resources warns 15 provinces, mainly in the North, of potential landslides and forest runoff from Thursday to Saturday due to heavy monsoon rain. Affected areas include Chiang Mai, Chiang Rai, and several others; residents and visitors should monitor conditions and move valuables to higher ground.
Northern Thailand highway partially flooded, drive with caution
Highway 118 between Chiang Mai and Chiang Rai is partially flooded in Wiang Pa Pao district of Chiang Rai, but remains passable with caution. Heavy rain is forecast through Friday, and a red downpour alert is in place for five other provinces.
Phuket prepares for more flooding after Friday rains
Phuket has installed large pumps in 10 locations across Muang district after Friday's flooding. The Meteorological Department warns of heavy rain from Sunday to Thursday, raising the risk of further flooding.
Flash flood warning issued for northern, central Thailand
The Thai Meteorological Department warns of heavy rain and potential flash floods from July 20-21, especially in the North and western Central region. Expats in foothill areas near waterways should monitor conditions and prepare for possible flooding.
Typhoon Bavi to bring heavy rain, flash floods July 10-15
The Meteorological Department warns that Typhoon Bavi, though staying offshore, will strengthen the southwest monsoon, causing heavy to very heavy rain and flash flood risks from July 10-15. Provinces on alert include Ranong, Phang Nga, Kanchanaburi, Chanthaburi, and Trat; rough seas are also expected in the Andaman Sea and upper Gulf. Expats in or traveling to these areas should monitor conditions, avoid flood-prone zones, and prepare for possible disruptions.
Tropical Storm Maysak Brings Heavy Rain to North, Northeast, East
Tropical Storm Maysak is not entering Thailand but will cause heavy to very heavy rain in the North, upper Northeast, and East on July 5-6, 2026. The Mekong River in Nakhon Phanom is rising, and small boats should stay ashore in the upper Andaman Sea due to high waves.
Heavy rain floods roads across Phuket
Phuket experienced heavy to very heavy rainfall, causing road flooding in Muang and Kathu districts. The Phuket City Municipality warns residents to move belongings to higher ground as more rain is expected. Flooding emergencies can be reported via hotlines 1132, 076-211111, or 199.
Landslide warning for 13 provinces including Chiang Mai and Phuket
Thailand’s Department of Mineral Resources warns of possible landslides and flash floods from July 1-3 in 13 provinces including Chiang Mai, Phuket, and Krabi due to heavy rain. Expats in those areas should monitor conditions and follow local emergency instructions.
Increased rainfall and flash flood warnings for next week
The Meteorological Department forecasts increased rainfall from Sunday through Friday, with risks of flash floods and forest runoff in several provinces, especially in the East and South, as well as Bangkok. Expats in affected areas should exercise caution.