Bangkok Monitors Five Major Canals as Flooding Persists
Bangkok declared a disaster zone as heavy rain since September 24 left five major canals and 93 streets waterlogged; drainage systems operating at full capacity may need 2–3 days to clear water once rain stops.
Bangkok Governor Chatchat Sittiphan announced the capital's flood situation on September 26 at the Flood Control Center, noting that conditions have stabilized following heavy continuous rain since September 24 that dumped over 100 millimeters across much of the city and up to 300 millimeters in some areas. The Metropolitan Administration declared Bangkok a disaster zone to accelerate relief efforts, with the flooding also affecting nearby provinces of Nonthaburi, Pathum Thani, Samut Prakan, and Chachoengsao.
The governor reported that five main canals are in critical condition: Praem Prachakorn, Lat Phrao, Sena Sab, Pravet Burirom, and Thuea Watthana. Approximately 93 streets remain waterlogged, including major thoroughfares such as Ekkamai, Sukhumvit, Phetchburi, Ratchadamri, Rama 9, and Phahon Yothin. Bangkok's drainage system is operating at full capacity with about 1,200 cubic meters per second of pumping power; if rain stops, it will take 2–3 days to clear standing water, though water inflow from surrounding areas may extend this timeframe.
The governor also announced that Bangkok has coordinated with the Royal Irrigation Department to manage water from upstream areas and is working with neighboring provinces to minimize impact. The administration has set up shelters in Bangkok schools and requested residents to monitor water levels and traffic conditions closely through the city's flood detection system.
