BMA accelerates drainage after accumulated rainfall over 300 mm, expects resolution in 2-3 days
Mr. Chadchart Sittipunt, Governor of Bangkok, reported on the flood situation in Bangkok on Saturday, September 26, 2026, at approximately 1:10 PM, after many areas experienced continuous heavy rainfall since September 24, resulting in widespread flooding on several roads and impacting public travel.
The BMA Governor stated that the accumulated rainfall since 4:00 PM on September 24 averaged more than 300 millimeters, covering Bangkok and neighboring provinces including Nonthaburi, Pathum Thani, Chachoengsao, and Samut Prakan. The amount of rainfall was similar to the storm event in 1983.
Recently, the low-pressure cell began moving northward, causing rainfall to tend to decrease. Meanwhile, the Bangkok Metropolitan Administration declared the area a disaster zone to facilitate the implementation of assistance and relief measures for affected citizens.
Phra Nakhon Side has 223 Million Cubic Meters of Accumulated Water; Pumping Accelerated
The Phra Nakhon side currently has approximately 223 million cubic meters of accumulated water, while the pumping system can drain about 1,100-1,200 cubic meters per second. If no more heavy rain occurs, it is expected to take approximately 2-3 days to drain the remaining water in the system.
Mr. Chadchart clarified that the main cause of this problem is the high water levels in the canals, or being in a 'red' status, which slows down the flow of water from road surfaces into the canals. It is not caused by water mass from the north. The crucial limitation lies in the canals' water retention capacity.
Meanwhile, canals in surrounding provinces, including Nonthaburi, Pathum Thani, and Samut Prakan, also have high water levels, which limits the ability to push water from Bangkok to neighboring areas.
สรุปข่าว
Mr. Chadchart Sittipunt, Governor of Bangkok, reported on the flood situation in Bangkok on Saturday, September 26, 2026, at approximately 1:10 PM, after many areas experienced continuous heavy rainfall since September 24, resulting in widespread flooding on several roads and impacting public travel.
The BMA Governor stated that the accumulated rainfall since 4:00 PM on September 24 averaged more than 300 millimeters, covering Bangkok and neighboring provinces including Nonthaburi, Pathum Thani, Chachoengsao, and Samut Prakan. The amount of rainfall was similar to the storm event in 1983.
Recently, the low-pressure cell began moving northward, causing rainfall to tend to decrease. Meanwhile, the Bangkok Metropolitan Administration declared the area a disaster zone to facilitate the implementation of assistance and relief measures for affected citizens.
Phra Nakhon Side has 223 Million Cubic Meters of Accumulated Water; Pumping Accelerated
The Phra Nakhon side currently has approximately 223 million cubic meters of accumulated water, while the pumping system can drain about 1,100-1,200 cubic meters per second. If no more heavy rain occurs, it is expected to take approximately 2-3 days to drain the remaining water in the system.
Mr. Chadchart clarified that the main cause of this problem is the high water levels in the canals, or being in a 'red' status, which slows down the flow of water from road surfaces into the canals. It is not caused by water mass from the north. The crucial limitation lies in the canals' water retention capacity.
Meanwhile, canals in surrounding provinces, including Nonthaburi, Pathum Thani, and Samut Prakan, also have high water levels, which limits the ability to push water from Bangkok to neighboring areas.
13 Main Roads Still Flooded
The BMA reported 13 main roads still experiencing flooding and difficult for small vehicles to pass. These include Ekkamai, where water pumps were affected by water and temporarily stopped working; Phong Phet Intersection - Ngam Wong Wan Road; Vibhavadi Rangsit Road (Chatuchak - Thai Airways section); Ramkhamhaeng Road (in front of Ramkhamhaeng University); Lat Krabang Road (King Kaew Soi section); Sena Nikhom Road (with water levels of approximately 50 centimeters); Chaeng Watthana Road (Lak Si Intersection - Expressway section); Srinakarin Road; Din Daeng Road (Din Daeng - Asok Intersection section); Phahonyothin Road (Saphan Khwai - Soi Ari section); Suwinthawong Road (Min Buri - Wat Saen Suk section); Ratchadaphisek Road; and Lat Phrao Road (Ratchada-Lat Phrao Intersection).
For citizens who wish to move their vehicles from risky areas, temporary free parking is available at all Park & Ride buildings of the Mass Rapid Transit Authority of Thailand (MRTA), Government Complex (Lak Si), as well as all branches of Central, The Mall, and Lotus's, and Fashion Island, in accordance with the announced measures.
233 Shelters Opened, Accommodating 15,000 People
For public assistance, the BMA opened 233 shelters using local schools, capable of accommodating approximately 15,000 people. Currently, 981 people have checked in.
Additionally, officials moved 36 bedridden patients and vulnerable individuals to hospitals for care. All district offices were ordered to set up central kitchens to prepare and distribute food to the public. Those who need sandbags can contact their local district offices.
For health emergencies or bedridden patients, contact hotline 1669. For general assistance, sandbags, or to report incidents, contact the BMA hotline 1555 or the phone numbers of all 50 district offices.
BMA Schools Closed on Monday, Civil Servants WFH
For measures on Monday, the Bangkok Metropolitan Administration ordered schools under its jurisdiction to suspend classes for the safety of students and to help reduce traffic volume on the roads.
As for BMA civil servants and personnel, they are to work from home, except for officials involved in public services and field operations, who must continue to perform their duties and monitor the situation.
Preparing to Adjust Warning System and Add Drainage Tunnels
Mr. Chadchart outlined post-flood strategies, stating that the forecasting and warning systems still need improvement. Technology will be introduced to increase accuracy, giving citizens more time to prepare.
Accumulated rainfall exceeding 300 millimeters is considered a large volume of water that the drainage system needs time to manage, especially when canals have high water levels. Therefore, long-term approaches must include enhancing the efficiency of drainage infrastructure, including the development of drainage tunnel systems, such as a tunnel from Prawet Burirom Canal to Nong Bon Lake, to increase capacity for handling heavy rainfall in the future.
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ที่มาข้อมูล : TNN
ที่มารูปภาพ : Thai News pix
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