A home has been destroyed as almost 150 firefighters continue to battle a New Year's Eve bushfire, with another emergency looming.
Authorities fear more properties will be threatened by the Wooroloo fire east of Perth as another blaze escalated in Western Australia's south.
The Wooroloo blaze has burnt through almost 750 hectares since it erupted about 2pm on New Year's Day.
Authorities on Thursday said the fire was stationary but had not been contained or controlled.
"We are aware that one house has been completely destroyed, but we understand it was unoccupied and currently the owners were overseas," WA Fire and Emergency Services Commissioner Darren Klemm told reporters.
"Another five non-residential buildings, which include sheds and greenhouses and machinery that was within those sheds, have also been destroyed."
The fire was downgraded to watch and act about 7pm on Wednesday but a possible threat to lives or homes remains, an Emergency WA alert said on Thursday.
WA’s biggest correctional centre, Acacia Prison, and the nearby minimum-security Wooroloo Prison Farm remain in the fire zone.
Both facilities have activated emergency plans and are being closely monitored.
"The prisons have extensive firebreak arrangements and their own firefighting capabilities," Mr Klemm said.
"We are confident they remain safe."
An evacuation centre has been established at the Northam Recreation Centre, about 40km north of Wooroloo, with locals urged to bring essential items such as medications and identifications.
"Our urban search and rescue teams are conducting rapid damage assessments, and we'll provide updates as soon as possible," Mr Klemm said of potential threat to other properties.
The Great Eastern Highway was shut at the height of the danger but re-opened on Wednesday night.
The Wooroloo blaze is not the only concern, with another fire threatening in the state's south near Albany.
An emergency alert was issued late on Thursday, with residents of Kojaneerup South, Green Range and South Stirling told it was "too late to leave".
And residents of Casuarina, Anketell, The Spectacles, Orelia and Bertram in Perth's south have been told to "prepare to leave".
The Green Range blaze, ignited by lightning, prompted urgent warnings for residents to enact bushfire survival plans immediately.
The South Coast highway remains closed, and aerial firefighting support has been deployed to assist ground crews.
"We're in the middle of a very challenging fire season," Mr Klemm said.
"Please stay alert, follow emergency updates, and avoid any activities that could ignite fires."
Extreme fire danger warnings remain in place for 14 districts across the state's south, including the Esperance coastal area which is popular with holiday makers.
Locals are being urged to use the Emergency WA app to stay informed.
"We're doing everything we can to prepare for and combat these fires, but we need the community to play their part too," Mr Klemm said.
Total fire bans remain in effect across dozens of WA's local government areas.
