Bangkok has declared a flood disaster across all 50 districts after nearly 48 hours of intense rainfall overwhelmed the Thai capital’s drainage network, submerging roads and severely disrupting everyday life.

Authorities have urged residents to remain indoors where possible, while communities living near Bangkok’s extensive canal network have been advised to move belongings to higher floors as water levels continue rising.

Although thunderstorms are common in Thailand during this season, the intensity and duration of the latest rainfall have exceeded the city’s drainage capacity. Flooded roads have worsened Bangkok’s already severe traffic congestion and disrupted businesses and transportation.

Residents near canals are facing particularly difficult conditions. Some areas have reportedly experienced waist-deep water, forcing shops to close and leaving people unable to move safely outside their homes.

The flooding has also revived memories of Thailand’s devastating 2011 disaster, when months of widespread floods killed hundreds of people. Some residents say current water levels in parts of Bangkok appear even worse, although no casualties have yet been reported in the capital.

Bangkok Governor Chadchart Sittipunt said eastern areas have been among the hardest hit. Authorities are pumping water continuously, but drainage efforts are being challenged because many canals are already full.

With further heavy rainfall forecast, the immediate challenge is preventing overflowing canals from worsening the crisis. The flooding once again highlights the vulnerability of rapidly growing megacities to extreme rainfall and the increasing importance of resilient drainage, urban planning and climate-adaptation infrastructure.