A very high tide caused flooding in coastal Samut Prakan's Phra Samut Chedi and Phra Pradaeng districts, leading to severe traffic congestion along Suk Sawat Road on Wednesday morning.
A section of the road near Phra Samut Chedi-Phra Chulachomklao Fort Intersection looked more like a canal, with local people commenting the water level was "unusually high" this year.
Small vehicles were restricted to using only the right lane, which led to a traffic snarl-up and a six-kilometre tailback of cars inching along the road.
The water was reported to have reached 80 centimetres deep in front of Phra Samut Chedi municipal office and up to 1.5 metres near Wat Laem Fapha on a minor road off Suk Sawat.
Suk Sawat Road links the area to western Bangkok.
Workers from the Disaster Prevention and Mitigation Department were using pumps to divert water out of the area.
Very high tides are expected for another two or three days, according to officials.
