Three separate bushfires around Collie were started by an electrical storm on Sunday evening and early Monday morning.
Department of Parks and Wildlife (DPaW) district manager Drew Griffiths said one of the fires, in Wellington National Park, was spread across an area of between one and two hectares.
"The fire started in a remote, inaccessible and very steep area of the forest," Mr Griffiths said.
"It took our land crews six hours to get to it as they had to dig their way through the bush."
Mr Griffiths said even though it was a hot and windy day the crews managed to keep the fire small because the area had been treated with prescribed burns six years ago.
Water bombers were utilised to keep the fire under control until land crews could access the area.
"Wellington Park demonstrates the advantages you get from prescribed burning," Mr Griffiths said.
"It took us six hours to get the land crews to the fire, had that been older fuels on the ground it would have been a lot harder for us to suppress with the water bombers."
The other two fires were relatively small and were extinguished by Monday afternoon.
DPaW has been burning off vegetation in bush land around Collie throughout autumn and spring, with a goal of treating 20,000 hectares before the restricted burning season arrives on December 20.
Mr Griffiths said DPaW has burnt half of the desired total so far this year but further burning off will be dependent on the weather.
"So far the weather has been good. Some burns which are planned between Collie and Bunbury are behind due to the Bunbury area drying slower than the Collie area," Mr Griffiths said.
DPaW is prepared for some of the fires from the weekend's storm to rekindle over coming days.
