Aerial crews have been sent in to assist firefighters on the ground as an out-of-control and unpredictable bushfire rages in Scotsdale, about 10 minutes west of Denmark.
The blaze was first reported at 2.45pm on Wednesday with six appliances on the scene by about 3pm.
Fifty bushfire service firefighters are actively fighting the fire, working to contain the blaze amid a possible threat to lives and homes.
A watch and act alert was issued for the fire at 4.43pm with the Department of Fire and Emergency Services advising people in the area to monitor conditions and leave if it is safe to do so in an easterly or westerly direction along Scotsdale Road.
The bushfire is moving slowly in a north-westerly direction.
Two water bombers have been called in to assist ground crews.
The watch and act area is bounded by Scotsdale, Walter, Glenrowan and Roberts roads.
Roads remain open but motorists are advised to avoid the area and drive carefully.
The Shire of Denmark is managing the fire with the support of the Parks and Wildlife Service on the scene.
Visit Emergency WA, call 13 DFES (13 3337), follow DFES on Facebook, listen to ABC Local Radio, 6PR, or news bulletins.
WHAT TO DOStay alert and monitor your surroundings as conditions could change.You may need to act quickly so ensure you are prepared if the situation gets worse.Read through your bushfire plan. If you do not have a plan, make one by visiting My Bushfire Plan.Have your emergency kit ready.If you are not prepared or you plan to leave, leave now if the way is clear.If you find it hard to move quickly, leaving now is your safest option.Keep your doors and windows closed to keep out smoke.Patrol your property and be ready to put out spot fires.If you plan to stay and defend ensure you are mentally and physically prepared, with protective clothing and an independent water supply.