Bushfire threatens lives and homes south of Perth

A bushfire burning south of Perth is threatening homes and people in the area, with about 180 firefighters battling the blaze.

Fire crews work on a roadside blaze. Source: DFES Incident Photographer Lewis van Bommel

An emergency warning remains in place for a bushfire threatening lives and homes across a string of suburbs in Perth's south.

About 180 firefighters are battling the blaze, which was reported at midday on Thursday near Baldivis, about 40km south of Perth.

It has since burnt through more than 300 hectares amid strong winds.

The emergency warning applies across an area spanning 20km north to Casuarina.

An evacuation centre has opened at Mike Barnett Sports Complex in Rockingham.

The Red Cross says people affected should register now to let family and friends know they are okay.