[REVISION HISTORY]

Thailand monsoon flooding and southern preparedness

Updated 10 times since CLSTR started tracking revisions of this situation.

What changed

2026-08-19 03:34 UTC → 2026-08-19 08:39 UTC · added ~~removed~~

The southwest monsoon remains intense, maintaining widespread heavy-to-very-heavy rain warnings across Thailand. On August 5, the Thai Meteorological Department (TMD) forecasted that heavy rain would affect 60–70% of the country, with the strongest downpours expected in northeastern provinces such as Nong Khai, Udon Thani, and Ubon Ratchathani. While tropical storm Kujira was not expected to enter Thai waters, its presence in the South China Sea, combined with a monsoon trough, contributed to waves of 2–3 meters in the Andaman Sea. In Nakhon Phanom, heavy monsoon rains caused significant flooding, submerging homes, businesses, and roads. The Mekong River rose to 10.78 meters; although this remains below the 12-meter overflow warning level, the elevated water has hindered the drainage of runoff from local tributaries and city systems. In response, Governor Adisak Noisuwan and Mayor Niwat Jiawiriyaboonma ordered a multi-agency response, utilizing eight large water pumps and distributing sandbags via disaster prevention officials and soldiers. By mid-August, the TMD issued further warnings for heavy rain and potential flash floods effective August 13. Intense downpours were expected to impact Northern Thailand—specifically Chiang Rai, Mae Hong Son, and Chiang Mai—through August ~~15, posing risks to residents in valleys and near low-lying riverbanks.~~ 15. On August 9, the Thai government issued directives to governors in 14 southern provinces to prepare for potential flooding and ~~droughts. Under~~ droughts under the direction of Prime Minister and Minister of Interior Anutin ~~Charnvirakul,~~ Charnvirakul. By August 19, Deputy Prime Minister ~~Piphat Ratchakitprakarn is overseeing a unified response. By mid-to-late August, weather patterns continued to drive severe risks. Between August 18 and 21, the TMD~~ Yotsanan Wongsawat issued ~~warnings for heavy~~ urgent directives to ~~very heavy rainfall driven by a monsoon trough over upper Laos and a low-pressure area~~ governors in ~~northern Vietnam. Extreme rainfall was forecasted~~ Nan, Phayao, and Lamphun to prepare for potential flooding and flash floods. Measures include monitoring high-risk zones, utilizing the ~~upper Northeast, specifically Bueng Kan~~ Cell Broadcast system, and ~~Nakhon Phanom,~~ preparing KA-32 helicopters for evacuations and ~~parts of the East, including Trat.~~ relief in hard-to-reach areas.

Versions

Only revisions since CLSTR began indexing content versions appear here. Select a version to see what changed compared to the one before it.