Raging fire in an area of about 400 rai (about 160 acres) on a high mountain in Samoeng district was causing thick smog in the northern province.
The Ministry of Natural Resources and Environment is offering help to the families of three forest firefighters who died while trying to contain wildfires.
About 3,000 officials of the Ministry of Natural Resources and Environment from the South were assigned to fight wildfires in the North.
The wildfire at popular Phu Kradueng national park of Thailand has been brought under control as over 200 hectares of forest has been destroyed.
Dozens of local soldiers, administrative officials and volunteers took several hours to finally control a forest fire in Mae Sot district of Tak but about 200 rai or 320,000 square meters of forestland was destroyed