FIREFIGHTERS have no confirmed timeframe for when they may be able to extinguish the Putty fire that threatened houses on Wednesday evening.
Crews battled the fire, which triggered an emergency warning level when it threatened remote properties around Putty Valley and Bakers roads late on Wednesday and into the early hours of Thursday.
It was ultimately downgraded about 2.30am to the advice level, which urges residents to stay away and consider leaving early.
Authorities believed there were no properties lost in the fire.
Rural Fire Service spokesman Greg Allan said residents south of the intersection between Putty Valley Road and Bakers Road were safe to return to their properties, while those in the north were still warned to stay away on Thursday morning.
About six residents had stayed behind to combat the fire after firefighters spoke to them of the risk, Mr Allan said.
Firefighters remained on the job throughout Thursday, identifying new containment lines and strengthening existing ones as heavy plant and water-bombing aircraft dampened the blaze.
The Putty fire began in late January.
Since then it has blackened more than 6700 hectares of difficult terrain in the Wollemi National Park and Putty State Forest.
Mr Allan said conditions remained hot and dry in the area.
Given the size of the fire, he said there were no guarantees.
“It’s pretty big, it’s a difficult area,” Mr Allan.
“They’re doing what they can to limit the spread of the fire.”