Warning issued for remote WA bushfire

A watch and act has been issued for an out-of-control bushfire in remote Western Australia.

The warning covers people travelling along the Great Northern Highway between Elvire River and Sophie Downs North Road in the Mueller Ranges region, as the blaze burns west towards the community of Milba.

"If you are not prepared or you plan to leave, leave now if the way is clear," the Emergency WA alert said on Sunday afternoon.