Many main highways in Sa Kaeo province have been flooded and are impassable to any kind of road vehicle, a highway police officer said.
Pol Sub Lt Wisal Juengtrakul said a huge volume of run-off water from Khao Soi Dao mountains in Soi Dao district of Chanthaburi has inundated much of Wang Sombun, Wang Nam Yen, Khao Chakan and Muang districts of Sakaeo.
A 700-metre section of Highway 317 (Chanthaburi-Sa Kaeo) at Ban Khao Laem in Wang Sombun district was under one metre of water on Sunday afternoon.
A section of the Aranyaprathet-Khao Hin Son road was also one metre under water at Ban Sa Khwan in Muang district.
Highway 33 (Sa Kaeo-Kabin Buri) was under 80cm of water, blocking all of its four lanes.
Sakaeo has virtually been cut off. It has become inaccessible from Prachin Buri's Kabin Buri district and Chachoengsao's Phanom Sarakham district.
Highway police were looking for routes which could be used to reach Sa Kaeo, Pol Sub Lt Wisal said.