Harrisdale residents have been asked to stay cautious as the bushfire that approached the southern Perth suburb has now been contained.

The Department of Fire and Emergency Services has changed its watch and act alert to advice for people living on or near Wright Road and Harrisdale Road. The homes are no longer at risk.

The department previously warned the bushfire was out of control and unpredictable.

The fire started near the intersection of Harrisdale Drive and Benalla Drive, near the Harrisdale Swamp, and was first reported about 9.40am.

Career Fire and Rescue Service firefighters are at the scene, patrolling and mopping up. Aerial support has been called in to help ground crews.