Safety
Heavy Rainfall Causes Flash Flooding in Bangkok
Intense rain has led to significant water accumulation under the Ngamwongwan expressway, causing traffic congestion.
On September 16, 2026, heavy rainfall struck Bangkok, overwhelming local drainage systems and causing flash flooding in key areas. According to a report by Matichon Online, the area beneath the Ngamwongwan expressway experienced significant water accumulation, with two lanes becoming submerged.
For residents and travelers in the capital, this event serves as a reminder of the city's ongoing challenges with seasonal drainage during intense downpours. The flooding has resulted in substantial traffic delays, impacting commuters navigating the northern parts of the city. Those planning to travel through the Ngamwongwan area should anticipate potential congestion and consider alternative routes if possible.
While the immediate impact on traffic flow is clear, the duration of the water stagnation and the full extent of the flooding across other parts of the city remain to be confirmed. Authorities have not yet provided a timeline for when the water will be fully cleared or when traffic conditions will return to normal. Travelers are advised to monitor local traffic updates and weather reports closely, as conditions in Bangkok can change rapidly during the rainy season.
