The RFS also issued warnings to leave the Batlow region,which is facing fires as early as Friday,and the National Parks and Wildlife Service ordered the evacuation of the Kosciuszko National Park.
Loading
Anyone in the Kosciuszko National Park,including the resorts at Thredbo,have been told they must leave the park before 10am on Friday.
Deputy Premier John Barilaro will arrive back in his electorate,which includes Kosciuszko,before Saturday after cutting short his European holiday.
Emergency Services Minister David Elliott,who left for a holiday in London earlier this week as the fires worsened,will also return on Friday morning ahead of Saturday's dire forecast.
In the far south of the state,towns are expected to come under threat from the border fires that have already devastated Victorian holiday towns including Mallacoota.
Two men have already been confirmed dead following the horror fires in the East Gippsland region of Victoria.
Police said it was believed the second Victorian man to die suffered a medical episode while fighting the fires. His body was found by family at a property in Maraningo Creek,near Genoa.
Premier Daniel Andrews said on Thursday there are grave fears for another 17 people.
On Thursday,the RFS was door-knocking homes and holiday houses,urging people to leave the NSW South Coast.
"We don't want a large population in the region,"senior RFS spokesman Ben Shepherd said.
The devastated area quickly became the land of queues:not just for petrol but also food and water. Road closures also slowed efforts to get people out.
In the devastated towns of Lake Conjola and Sussex Inlet between Ulladulla and Nowra,police escorted some residents along roads that otherwise remain closed to the public.
A lack of power prevented many petrol stations in the area from pumping,although supplies returned as generators come online and power was restored to some towns.
Loading
Late on Thursday,Essential Energy said it had restored power to about 23,000 of the 37,000 customers hit by the New Year’s Eve fires.
Bega MP and Transport Minister Andrew Constance,who managed to save his house from the fire that tore through Malua Bay,said it was the"largest relocation of people out of the region in history".
"It's going to be a blast furnace,"Mr Constance said.
Federal Labor MP Mike Kelly,whose electorate covers much of the South Coast area under threat,said he had never seen things this bad.
"There is nowhere in my electorate that isn’t being touched,"Mr Kelly said.
The RFS has confirmed almost 400 homes had been lost in NSW in the latest fire crisis,with about 1300 homes destroyed since the start of the season. Fifteen people have died so far in NSW,with 3.6 million hectares burnt.
More than 110 fires are still burning across the state,including 50 which are out of control.