Queensland Fire and Emergency Services says a large fire on the southwestern side of Alfred Martin Way is moving slowly in a southeasterly direction.
An expected wind change at 2pm on Saturday is likely to push the bushfire in a northwesterly direction.
Authorities say the fire could reach the north side of Mitchell Crescent, Illawong Crescent, Rainbow Crescent, Dickson Way and the Seven Mile S-bend.
People in these areas are being advised to finalise their bushfire plans.
The Dunwich Community Hall has been made available for those who choose to relocate.
Firefighters are working to control the blaze.
On Friday campers and miners in the Dunwich area were asked to leave after the fire jumped containment lines.
Meanwhile, residents on the mainland and Southern Moreton Bay Islands are being asked to conserve water after a treatment plant was damaged on North Stradbroke Island.
The treatment plant is one of just two that service the region.
North Stradbroke Island residents are not being asked to conserve water as the plant doesn't service the island.
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