A bushfire advice has been issued for people near The Lakes in the Shire of Mundaring.
The fire was reported just after 1pm on Wednesday near the intersection of Horton Road and Great Southern Highway.
The Department of Fire and Emergency Services said although there is no immediate danger, people in the area need to be aware and keep up to date in case the situation changes.
The bushfire is moving fast in a south easterly direction and is out of control and unpredictable.
Firefighters are on the scene, actively fighting the fire.
DFES is managing the fire.
Motorists are asked to avoid the area, reduce speed and drive carefully due to smoke.
For more information visit www.emergency.wa.gov.au.