Bushfire warnings in place across WA

Bushfire warnings remain in place across Western Australia, with a severe threat for parts of the Pilbara.

The DFES on Saturday morning issued a severe fire danger rating for inland parts of west Pilbara, including the Shire of Ashburton, due to a change in weather conditions.

"These are very hot, dry and windy conditions for a bush or grass fire," the warning said.

"If a fire starts and takes hold, it will be unpredictable, move very fast and (be) difficult for firefighters to bring under control," DFES said.

Meanwhile, a bushfire alert remained in place for people travelling on the Great Northern Highway between Kumarina Roadhouse and Three Rivers Station in the Shire of Meekatharra.

The out-of-control bushfire wasn't threatening homes, but it was causing a lot of smoke in the area, the department said.

Another out-of-control fire was burning in the western part of Bullsbrook in the City of Swan.

It wasn't threatening homes either, but had created a lot of smoke.

Another fire nearby in east Gidgegannup had been contained, but a warning was still in place.

A blaze near Mundaring was also creating a smoke hazard in the area, but had been contained as well.