'Shelter to survive': fire threatens coastal community

Residents in a series of coastal communities have been told it's too late to leave their properties and they should find shelter to survive.

An emergency warning is in place for parts of Wedge Island, Grey, Cervantes, Nambung and Cooljarloo in the Shire of Dandaragan in Western Australia.

It includes the fishing villages of Wedge Island and Grey, about 170km north of Perth, where residents have been told: "It is too late to leave and you must act immediately and take shelter now to survive".

"You are in danger and need to act immediately to survive," the Department of Fire and Emergency Services said in an alert on Thursday.

"There is a threat to lives and homes."

People in the town of Cervantes, about 200km north of the WA capital, have also been told it is too late to leave.

"Fire has impacted evacuation routes and leaving now will put your life in danger," the alert said.

"You need to identify a room in your home where you can shelter from the approaching fire.

"It should have running water, such as a kitchen or laundry, and have a clear exit so you can easily escape."

About 200 firefighters are battling the Dandaragan blaze. Crews are also building containment lines around Cervantes, a town of about 500 people.

Two large air tankers are flying from NSW to help the four fixed-wing aircraft and two helicopters fighting the fire.

Parts of Indian Ocean Drive and multiple surrounding roads have been closed in the area.

"The bushfire is moving in a westerly direction towards Cervantes, Wedge and Grey," emergency services said.

"It is not contained or controlled."

The blaze was started on Monday by a fatal car crash and has burned through about 43,000 hectares of bushland.

Two volunteer firefighters were burned on Wednesday as the blaze flared.

A man in his 60s, who was airlifted to Fiona Stanley Hospital with non-life-threatening injuries, remains in the facility in a stable condition.

The other firefighter sustained minor injuries and was treated at the scene.

An evacuation centre is open at Jurien Bay Sports and Recreation Centre.

Nambung National Park has also been closed.

An emergency warning issued for a separate inland bushfire in the Shire of Toodyay, about 90km northeast of Perth, has been downgraded to watch and act.