A Port Denison bushfire, raging for six days, breached containment lines and has been upgraded to an emergency warning, triggering immediate evacuations for the affected area.

For ongoing updates, the public should refer to the Emergency WA information source.

Investigations point to a likely fault in electrical infrastructure near Teatree Grove; Western Power is conducting its own inquiry.

Residents are urged to act quickly: prepare emergency kits, seek shelter in secure rooms if escape isn’t possible, close doors and windows, switch off evaporative cooling, and ensure water is available in the shelter room.

The evacuation zone is defined by Hamersley Drive, the railway line, Gallagher Way, Sea Ripple Avenue, the coastline, Kailis Drive in Mount Adams, Port Denison, and Springfield, with specific directions: those north of Dongara Airport evacuate north; those south evacuate east.

The fire has burned about 852 hectares, is moving southwest, with around 50 firefighters on the ground and aerial support; containment and control are no longer in place.

About six days into the event, containment lines were breached after earlier containment and a temporary easing of threat.