Heavy rains since mid-September have caused flooding that has affected millions of people across the country.
September falls in the heart of the monsoon season in Thailand, where cities and towns are accustomed to the afternoon rains and thunderstorms that often roll through.
Prachin Buri province was among the areas where flooding was widespread. The right image above shows land along the Bang Pakong River and nearby agricultural areas and aquaculture facilities inundated on October 2, 2026. The left image shows the same area at the same time of year in 2025.
Some of the flooding likely stemmed from a low-pressure system that stalled over the area for several days in late September. Stoked by moisture and energy from the warm Gulf of Thailand nearby, the system delivered especially intense rains to the region. About 100 kilometers to the west, Bangkok received nearly 300 millimeters of rain over a 48-hour period, according to news reports, close to the average monthly rainfall total for September of 344 millimeters.