Economy
Mae Sai Residents on Alert as Sai River Levels Recede
Heavy rainfall in Myanmar caused the Sai River to overflow in Tachileik, prompting concerns in Chiang Rai, though water levels in Mae Sai are now trending downward.
On September 7, 2026, heavy rainfall in northern Myanmar—recorded at 88.6 millimeters at the Jotada station—caused a rapid surge in the Sai River. According to Khaosod Online Thailand, water levels at the 1st Thai-Myanmar Friendship Bridge reached 398.36 meters, exceeding the riverbank by 0.77 meters. This development caused significant concern among residents in Mae Sai, Chiang Rai, due to the proximity of the flooding in the neighboring town of Tachileik, Myanmar, where riverbank defenses collapsed and water levels reached approximately 50 centimeters in some areas.
Chiang Rai Governor Chuchip Pongchai and Tachileik Governor Tin Htwe Tun have been coordinating closely to monitor the situation. As of the latest reports, the situation is improving, with water levels beginning to recede. The water remains contained within the flood barriers on the Thai side, and there have been no reports of flooding in the economic zones or major communities of Mae Sai.
For residents and travelers in the area, while the immediate threat to Mae Sai appears to be subsiding, the situation remains fluid. It is advised to monitor local updates from provincial authorities regarding border crossing accessibility and potential secondary impacts from the upstream rainfall. Further confirmation is pending regarding the full extent of infrastructure damage in Tachileik and the long-term stability of the riverbanks.