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Thailand Issues Heavy Rain Warning for 41 Provinces

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Thailand Issues Heavy Rain Warning for 41 Provinces

The Thai Meteorological Department has issued a severe weather alert for 41 provinces, including Bangkok, due to heavy rainfall and potential flash floods.

On September 13, 2026, the Thai Meteorological Department (TMD) released its 13th weather warning regarding heavy to very heavy rainfall across Thailand. According to Khaosod Online, the alert covers 41 provinces, including Bangkok and its surrounding metropolitan area.

The weather system is driven by a combination of high-pressure air from China moving into the upper northern and northeastern regions, alongside a monsoon trough passing through the central, southern, and eastern parts of the country. This is further intensified by a strong southwest monsoon over the Andaman Sea and the Gulf of Thailand.

For residents and travelers, this weather poses a significant risk of flash floods and forest runoff, particularly in low-lying areas and regions near hillsides. Authorities have advised the public to avoid travel through areas prone to recurring flooding and to exercise extreme caution when planning daily activities.

Additionally, the TMD is monitoring a strong low-pressure cell off the coast of central Vietnam, which is expected to intensify into a tropical cyclone. This system is projected to move toward the upper coast of Vietnam between September 13 and 14, 2026. While the immediate impact on Thailand is currently being managed through these warnings, the exact trajectory and intensity of the developing tropical cyclone remain subject to further updates. Residents are encouraged to monitor official weather forecasts closely for the latest developments.