A bushfire that was threatening lives and homes and the Pearce Royal Australian Air Force base in Bullsbrook, north-east of Perth, has been downgraded to an advice.

The blaze created a series of fire tornadoes along one of the fire fronts. ( ABC News )

The bushfire started near Almeria Parade and was reported to authorities at 12:30pm.

A fire tanker sprays a fire near a tower in a field near Pearce airbase. ( ABC News )

There is still a lot of smoke in the area and drivers are urged to use caution.

The bushfire has spread onto the RAAF Base Pearce, north-east of Perth. ( ABC News )

The RAAF Base Pearce is the only RAAF airfield of its kind on the west coast of Australia and is being used as the WA base for the large air tanker firefighting aircraft during the bushfire season.

It is also used by the Republic of Singapore Air Force, which has a squadron based there.