
The Department of Disaster Prevention and Mitigation (DDPM) sent a Cell Broadcast alert to mobile phones across Bangkok at 9.22am on Saturday (September 26), warning that canal water levels had reached critical levels and were continuing to rise.
The alert advised residents living along canals and in low-lying areas to move belongings to higher ground, secure valuables in safe places and prepare for further increases in water levels.
People were also urged to avoid travelling through flooded areas and to check road conditions before setting out.
Anyone requiring assistance was advised to contact their local district office so officials could coordinate support.
The warning came as persistent heavy rain caused flooding and waterlogging in several parts of Bangkok, with authorities continuing to closely monitor rainfall and water levels.
Following overnight downpours that left several parts of the capital flooded on Saturday morning, the Bangkok Metropolitan Administration (BMA) made available a real-time travel monitoring and warning system to help motorists assess conditions before travelling at https://claude.ai/artifact/N6umcENfSgoY6GMkhVKwZs
According to the information provided, 21 major routes were classified as red, indicating severe flooding, critical conditions and heavy traffic congestion.
The red-alert routes are:
Another five routes were classified as orange, indicating moderate flooding and slow-moving traffic requiring close monitoring.
They are:
Under the BMA warning system, red means severe flooding and routes should be avoided immediately, orange indicates moderate flooding with slow traffic, while green means normal travel conditions with no reported waterlogging.