Queensland fire authorities have issued an advice warning for the second time on Sunday, this time for a large vegetation fire near Nambour.
The blaze spread from a car fire about 11.30am and is burning near Smallwood Road, Image Flat Road and Wappa Dam Road at Kiamba.
Fourteen crews are on the scene and residents are being urged to consider taking precautionary measures such as putting on protective clothing, wetting down possible fuels near buildings and moving cars to safe areas.
An advice warning remains in place for a large bushfire that jumped containment lines near Goondiwindi on the Queensland/NSW border.
That fire is now burning on both sides of Weir River 20km east southeast of Moonie, and residents in the Waar Waar, Crowders Creek, Mundagai, Tarcoola and Cattle Creek areas have been told to remain vigilant.
Fire bombers and ground crews are working to protect properties in the area.
When an advice warning is issued, it indicates a fire or other emergency has started but with no immediate threat.
Meanwhile, a bushfire burning near Elliott Heads has created a large smoke haze and residents are being advised to close windows and doors if they suffer respiratory problems.
Fire bans are in place in parts of the state, including Brisbane, where temperatures were expected to reach 40 degrees.
Further west, temperatures of 43 and above were forecast.
The Bureau of Meteorology says conditions are extremely challenging for firefighters, with the high temperatures accompanied by strong northwesterly winds.
Humidity will climb during the afternoon but will do little to quash the fire threat, the Bureau said.
Firefighters were battling around 30 fires on Sunday, with none threatening homes.