The blaze has destroyed at least 86 homes and has burned almost 11,000 hectares in total.
The region is still on high alert with strong wind gusts of up to 90 km/h expected on Saturday afternoon. People who go into the fire-affected area with a permit really need to be mindful of the affect of that wind on trees and branches and the like, that may have been weakened by the fire, Commissioner Klemm said.
The remains of a house destroyed by a bushfire is seen on Dinsdale Road, Gidgegannup in Perth.
AAP
The downgrading from an emergency warning to a watch and act alert occurred on Saturday just after 10am AWST. It applies to Avon Valley National Park, Brigadoon, Bullsbrook, Gidgegannup, Upper Swan and Walyunga National Park.
Wild weather is forecast to batter large areas of the east and west coasts of Australia in the next 24 hours - with a once in a decade flood threat affecting some parts of Western Australia.
Rain relief is imminent after another dangerous night on the frontline of a devastating bushfire in the Perth Hills that has destroyed at least 86 homes.
Hopes are high that forecast weekend rain will help firefighters get on top of the week-long blaze as a tropical low tracks towards the southwest.
But weary firefighters are expected to face their toughest challenge, with conditions forecast to worsen before they get better. Hopes are high that forecast weekend rain will help firefighters get on top of the week-long blaze as a tropical low tracks towards the southwest (pictured, a home destroyed on Friday in Perth Hills)