Ten fire crews are still working to contain bushfires on Bribie Island, north of Brisbane.
In the latest bushfire advice issued on Thursday, the Queensland Department of Community Safety says properties aren't being threatened, but a large-scale backburn in the forested area on the island's west side is spending smoke across the area.
Sixteen crews had worked overnight to strengthen containment lines after blazes looked likely to threaten homes on Wednesday.
People with respiratory problems are still being advised to stay indoors.
Residents near White Patch have been urged to listen for radio updates.
Acting Community Safety Minister Steve Dickson says more than 400 hectares of plantation forest and 700 hectares of national park had been affected by bushfires.
"The firefighters in the region have done an amazing job both fighting flames and containing fires," he said in a statement.
"Together with other emergency workers they have been able to protect the Bribie Island community while working in searing heat along difficult terrain."
The Bureau of Meteorology has warned conditions across the state indicate a high fire danger, with temperatures expected to rise well above 30C in most areas.