Firefighters are working to control a fire burning in rough terrain at Moore Creek, which burnt out more than 30 hectares of land north of Tamworth on Thursday afternoon.
On Thursday night, about 12 firefighters and four trucks continued to monitor the fire and ensure it didn't spread to nearby homes.
RFS Inspector Sean Barton said fixed-wing aircraft would be deployed to the area to strengthen retardant lines in the rugged terrain at the fire's north east.
There are concerns north easterly winds between 15km/h and 20km/h on Friday afternoon could flare up the flames.
There are also predictions for thunderstorms later on.
The Rapid Area Response Team helicopter from Sydney is on standby at Tamworth airport.
Three fixed-wing aircraft and a helicopter worked overnight to halt the path of the fire as it continued its way towards the hills.
Rural Fire Service Inspector Steve Prior said the cause of the blaze was undetermined but while no property was destroyed, homes were “most definitely threatened.”
“The homes up the hill and the ones in the lower part came under threat but that threat was mitigated by the efforts of firefighters on the scene,” he said.
“Tamworth Precision Excavations were working in the area with a grader and a water car and offered that up and started assisting us as soon as the fire kicked off. It was very generous and community-minded.
"We’ve been getting very good intelligence coming from the bomber pilots on the other side of the hill and they were telling us what’s happening and giving us an eye-in-the- sky look to help alter our strategies.”
Source: The Northern Daily Leader