Bangkok: Warning: Sea level rises "above critical level" of 20 cm, risking overflow of the Chao Phraya, Tha Chin, and Mae Klong rivers. The Royal Irrigation Department (RID) issued a warning to watch out for rising sea levels, which will rise 20 centimeters above the critical level and could overflow the banks of riverside areas in the Chao Phraya, Tha Chin, and Mae Klong river basins from October 9-18.
According to Thai News Agency, the Office of National Water Resources (ONWR) has issued a warning for high tides from October 9-18, 2025, from 6:00 AM to 5:00 PM. The water level around Phra Chulachomklao Fort and surrounding areas is expected to rise approximately 1.70-1.90 meters above mean sea level, which is approximately 20 centimeters above the critical water level.
Factors contributing to rising water levels include the southwest monsoon and easterly winds, rainfall in some areas, and water from the upper reaches of the river basin flowing together, causing water levels in the Chao Phraya, Tha Chin, and Mae Klong rivers to rise. Overflows may occur in low-lying areas along the riversides, outside the embankments, or along the gaps, particularly in Samut Prakan, Bangkok, Nonthaburi, Pathum Thani, Samut Sakhon, Nakhon Pathom, and Samut Songkhram provinces.
The National Water Resources and Environmental Policy and Planning Office (NWRP) requests relevant agencies to expedite the following actions: check and strengthen the stability of temporary embankments and dams, monitor low-lying riverside risk areas and warn the public in advance, and prepare machinery and tools to help people.