Bangkok flooding: heavy rain exceeds city drainage capacity of 60mm
Bangkok Governor Chadchart says heavy rain of over 130mm overwhelmed the city’s 60mm drainage limit, causing flash flooding across several districts overnight
Chadchart visited the Bangkok Flood Control Operations Centre at the Department of Drainage and Sewerage Division 2 in Din Daeng to oversee the response.
He explained that the downpour resulted from a weakening high-pressure system, which allowed a low-pressure trough to move over Bangkok, triggering intense rain. Other high rainfall readings were recorded at Bang Na (116.5mm), Phra Khanong (115.5mm), and Khlong Toei (105.5mm). The rain eased around 2am.
“As I’ve said before, Bangkok’s drainage system is designed to handle up to 60mm of rain. Last night, many areas saw more than double that amount, leading to widespread flooding,” Chadchart said, adding that city staff worked through the night “both in front-line and back-office roles.”
By 10am Monday, most floodwater across Bangkok had receded, though some small lanes remained partially flooded.
He noted that Chalongkrung 15 Road in Don Mueang and On Nut 59 Road still required long-term improvement plans, as both are low-lying and currently under road construction.
The Bangkok Metropolitan Administration (BMA) forecast 70% chance of thundershowers in Bangkok and nearby provinces throughout November 3, but expects rainfall to decrease over the next three days.
Residents can monitor real-time flood points via the BMA Flood Prevention Centre Facebook page or on the city’s real-time flood map website.
