Bangkok:
The announcement, signed on Saturday, September 26th, 2026, expands an earlier designation that had covered only Nong Chok, Suan Luang, and Khan Na Yao districts. It takes effect from September 25th and applies citywide.
The move is intended to speed up coordinated relief. Under the Disaster Prevention and Mitigation Act of 2007 and related national and Bangkok plans, the declaration authorizes government agencies, local offices, and partner organizations to mobilize resources quickly and systematically. Residents are being advised to photograph damage before and after flooding so they can apply for assistance. District offices have been instructed to survey bedridden patients and other vulnerable people, prepare school-based shelters with food and sanitation, distribute sandbags, manage traffic and emergency access, and accelerate drainage and cleanup.
A low-pressure system and monsoon trough have dumped persistent rain on Greater Bangkok since Thursday. Eastern districts have been hit hardest. Twenty-four-hour totals reached 190.5 mm in Khlong Sam Wa and more than 150 mm in several other eastern areas, filling major canals such as Saen Saep, Prawet Burirom, and Lat Phrao to capacity. Once the canals overflowed, water had nowhere to go and backed up onto streets. Depths of 20–28 cm were reported on multiple roads, including stretches of Lat Phrao, Ram Intra, Nawamin, Ramkhamhaeng, On Nut, and Sukhumvit. Inbound water from Nonthaburi and Pathum Thani has added to the problem.
The Thai Meteorological Department (TMD) has warned that heavy to very heavy rain will continue through Sunday, September 27th. Thunderstorms are forecast across 80 percent of Bangkok and surrounding provinces, with isolated very heavy downpours. The TMD has flagged flash-flood and runoff risks, especially in low-lying areas and near waterways, and advised small boats in the upper Gulf of Thailand to remain ashore. Minimum temperatures in the capital are expected around 23–24°C and highs 29–31°C.
City pumps and drainage tunnels are operating at full capacity, but officials say the volume of rain has exceeded the system’s ability to keep canals from overflowing. Governor Chadchart has urged residents living beside canals to move belongings and vehicles to higher ground and to stay alert until the weather improves. Temporary shelters are being readied at Bangkok Metropolitan Administration schools. Motorists have been told to check flood maps before traveling and to avoid the worst-hit routes.
Authorities say they will continue monitoring conditions and holding regular command meetings as the system slowly moves through the region.
This is a developing story.