Update Friday 3.30pm
The fire off Yarralaw Road at Windellama has been contained.
RFS Southern Tablelands RFS operations director Michael Gapps said aviation support and eight RFS trucks had managed to get around the outbreak with little difficulty.
It has burnt two hectares on a private property. The cause is being investigated.
Mr Gapps said an ambulance was called to treat an elderly man in the nearby home for heat stress. He could not say how close the fire came to the house.
People at the property had tried to extinguish the outbreak before crews arrived.
Meantime, the 20,031 hectare Morton fire is at advice level. While most of the activity today is around the Bundanoon area, Mr Gapps says its behaviour is "quite benign" around Tallong.
Nearby, there was increased activity on the Currowan blaze in the Shoalhaven Gorge area and up to South Marulan.
"(Crews) investigated it last night and it was going down the gorge towards the river so it's not a great concern. It's in inaccessible country and is being monitored," Mr Gapps said.
On the 278,589 Green Wattle Creek fire, several hotpsots flared around the Bannaby area on Friday.
Crews are undertaking tactical burns around the Mares Forest area.
MR Gapps said heavy plant and aviation was also strengthening containment lines. Five or six units will be on the ground tonight and double this number on Saturday and Sunday.
Temperatures in the high 20s and low 30-degree mark are forecast over the weekend. North-northeasterly winds are predicted, which may blow smoke towards Crookwell.
It's little surprise to Mr Gapps that fires are flaring up, despite some rain across the grounds.
"It's an indication of how dry the landscape is and the amount of fuel," he said.
"A few hundred millimetres of soaking rain over the next few weeks would be fantastic. Some showers are forecast over the weekend but there's not much in them. It may be more of a hindrance than a help when it comes to backburning."
A helicopter has been deployed to douse an out of control fire that has broken out near Windellama.
RFS operations officer Michael Gapps said a resident reported the outbreak at 252 Yarralaw Road at 1.20pm. It is located about 4km north of Windellama and is burning in bushland.
At 2pm, Mr Gapps said initial reports put it at almost half a hectare in size.
Five brigades, including Windellama, Tarago, Goulburn, Bungonia and Gundary were enroute to the scene. A water bombing helicopter, believed to have been working in the Lake George zone, was also deployed.
"There's been some overnight rain so hopefully that will slow it down," Mr Gapps said.
He urged residents to monitor conditions.
RFS brigades also attended another fire in the area at Mogo Road on Thursday that broke out at about 6pm.
Also on Thursday, at about 1pm, crews pounced on an outbreak at Mount Fairy Road, Lower Boro. Mr Gapps said it was quickly controlled.