The Bussell Highway remains closed in the Augusta-Margaret River region as bushfires continue to burn out of control.
The highway is still shut due to heavy smoke in the area.
Jordan Marshall, 40, was last seen where one of the fires started on Caves Road.
Anybody who sees him is urged not to approach, but to contact police immediately on 131 444.
More than 5000 hectares have so far been burned, with 150 firefighters on the ground trying to contain the blaze as it approaches Karridale.
DFES Assistant Commissioner Rick Curtis said the weather conditions were becoming more mild, but the fires were both “very much ongoing”.
“We’re focusing on containment lines today to the east of the fire, with the weather pushing winds from the west,” he told Today.
“That’s our focus for today, using large air tankers, ground crews and machinery to strengthen those already-built containment lines.”
Mr Curtis urged residents to enact their bushfire survival plans and heed advice from firefighters.
“Our crews on the ground are working very hard, so our message to the community is: follow our advice, work with us to bring those incidents to a resolution,” he said.
“With the support of the NSW Rural Fire Service, with the large air tankers, it’s made a massive difference.”
“[The] situation in this area is extremely serious. A number of properties are under threat,” WA Department of Fire and Emergency Services (DFES) Commissioner Darren Klemm said yesterday.
“People in the warning area of these emergency warning areas are in danger.”
He is urging residents to enact their bushfire survival plans immediately.
A watch and act alert is also in place for the towns of Redgate, Witchcliffe and Karridale in the Augusta-Margaret River Shire.
Milder conditions overnight have helped firefighters in their battle, but people are still urged to avoid non-essential travel.
It’s hoped similar conditions will aid firefighting efforts today.
An emergency warning has been downgraded to watch and act for for residents in Yallingup in the town of Busselton as a fire rages along Quiniup Road and Tilly Road.
The NSW Rural Fire Service has also been called to action to help WA firefighters, with a large RJ-85 air tanker sent west.
“Obviously the safety of the community is our highest priority and we’re doing everything possible to get this fire under control,” Mr Klemm said.