Three days of rain
Authorities in Thailand declared a flood disaster zone across all 50 districts of Bangkok after days of heavy rain overwhelmed the capital's drainage system. Governor Chadchart Sittipunt said almost 300 millimetres, about 11.8 inches, had fallen since Thursday afternoon.
Roads in the city centre were submerged, and people living near the canal network were told to move belongings to upper floors. Residents were urged to stay home, and the city's rail authority opened free park-and-ride spaces until 2 October for drivers who wanted their cars on higher ground.
Hundreds of thousands affected
More than 700,000 people have been affected, according to relief workers, and at least two deaths have been confirmed. Schools closed in several areas, and pumps ran around the clock to push water toward the sea.
The government said the situation had stabilised and that draining could still take two or three days if the rain holds off.
A recurring problem
Bangkok sits on soft ground barely above sea level and has subsided for decades as groundwater has been pumped out. Its canals, built to carry monsoon water, are now often narrowed or built over. The city has invested in tunnels and pumping stations, but planners say the network struggles when extreme rain arrives in a short window.
This week's rainfall fits a pattern of heavier single-day totals in Southeast Asia, the kind of event climate researchers expect more often as a warmer atmosphere holds more moisture. For Bangkok, the test is not only the storm itself but the speed of recovery, how quickly water leaves the streets and how well the next downpour is absorbed.
The disruption carries a cost. Shops closed, delivery routes were cut and commuters shifted to trains, while officials said more rain was forecast for the weekend. Clean-up crews have been working through inundated neighbourhoods to clear drains and remove debris.