Residents in parts of the City of Kalamunda have been forced to defend their homes with hoses, sprinklers and buckets of water, as firefighters battle an out of control bushfire.

The Department of Fire and Emergency Services issued an emergency warning at about 3.05pm on Tuesday, before downgrading it to a watch and act at about 4.45pm in parts of High Wycombe, and Maida Vale at about 4.45pm, after slowing the rate of spread.

The bushfire — first reported about 2.05pm — is continuing to move in an easterly direction, and is not contained or controlled.

Up to 13 appliances are on the ground to fight the blaze, with at least one water bomber assisting from the sky.

Shocking photographs show locals protecting their own homes, with one High Wycombe resident forced to activate his property’s roof sprinkler.

Drivers are stuck in their vehicles with the bushfire closing the road.Camera IconDrivers are stuck in their vehicles with the bushfire closing the road. Credit: 7NEWS

DFES warned there was a possible threat to lives and homes, and said conditions were continuing to change.

“Stay alert and monitor your surroundings as conditions could change,” a spokesperson said.

“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.”

A waterbomber at the scene.Camera IconA waterbomber at the scene. Credit: 7NEWS

An evacuation centre has since been set up at High Wycombe Community and Recreation Centre. Residents were urged to bring any essential items to the centre with them, including medication and identification.

Several roads, including Roe Highway between Berkshire Road and Kalamunda Road, remain closed, and drivers were urged to stay alert and seek an alternate route.

A resident seen using her hose to wet her house.Camera IconA resident seen using her hose to wet her house. Credit: 7NEWS

Dramatic footage from Main Roads show parts of Roe Highway covered in thick black smoke, with several spot fires smouldering in the median strip.

A separate bushfire advice warning is in place for residents east of Hawtin Road to West Terrace at Maida Vale.

DFES said there is no threat to lives and homes, but urged residents to take care and stay alert for smoke and fallen trees or power poles.