Chao Phraya Flood Warning Issued for 10 Central Provinces
Thailand's disaster agency has issued a flood warning for 10 central provinces and Bangkok as the Chao Phraya River is expected to rise 0.2–0.6 meters in low-lying areas outside embankments. Dam discharge rates are being increased to manage upstream inflows, and authorities have mobilized 24-hour response teams across the region. Residents in affected districts of Ayutthaya and along the riverbanks are urged to monitor official channels and prepare to move belongings to higher ground.
On November 12, 2026, Nirat Pongsitthaworn, Director-General of the Department of Disaster Prevention and Mitigation, announced that the department is tracking weather conditions and risk factors. The Royal Irrigation Department's ninth Chao Phraya basin warning forecasts peak flow of 1,200–1,300 cubic meters per second at station C.2 in Mueang Nakhon Sawan on November 12, with tributary inflows of about 300 cubic meters per second. This brings upstream volume at Chao Phraya Dam to 1,500–1,600 cubic meters per second, with 500–550 cubic meters per second diverted into irrigation canals on both banks. Consequently, discharge through the dam's tailwater must reach 1,000–1,200 cubic meters per second, raising water levels by 0.20–0.60 meters in low-lying areas outside embankments in Sena, Phak Hai, Bang Ban, Phra Nakhon Si Ayutthaya, Bang Pa-in, and Bang Sai districts of Phra Nakhon Si Ayutthaya Province, without affecting residential communities.
The Central Disaster Prevention and Mitigation Command has coordinated with 10 central provinces — Uthai Thani, Chai Nat, Sing Buri, Ang Thong, Suphan Buri, Phra Nakhon Si Ayutthaya, Lop Buri, Pathum Thani, Nonthaburi, and Samut Prakan — plus Bangkok and Disaster Prevention Centers in Regions 1 (Pathum Thani), 2 (Suphan Buri), and 16 (Chai Nat). Authorities have alerted relevant agencies, private businesses operating on the Chao Phraya such as flood barrier construction projects and riverside restaurants, and residents along both banks of the Chao Phraya and Noi Rivers to closely monitor the situation and prepare for potential water level increases.
If conditions worsen, provinces are instructed to coordinate with local administrations, inspect embankments, ready disaster equipment and personnel for 24-hour operations, and disseminate warnings through all channels. Residents, especially those in low-lying areas outside embankments, should follow official announcements, prepare for flooding, and move belongings to higher ground. Emergency assistance is available 24/7 via Line "DDPM Report 1784" (Line ID @1784DDPM) and hotline 1784.
