Firefighters have been using special tools to detect the underground smouldering areas and have brought in large hoses to pour water into the ground to stop the fire from expanding.
Since July 29, the peat forest fire covering the districts of Cha-uat, Chalerm Phrakiat, Chian Yai, Hua Sai and Ron Phibun has damaged a total area of 14,478 rai (2,316 hectares), including 4,551 rai of farmland.
Meanwhile, the Royal Forestry Department has sent the Phayak Prai task force to inspect the damage in the forest reserve, a source at the department said.