The whole of the state was declared in drought last week and the dry conditions and strong winds fanned the blazes yesterday.
"Embers will be blown up to six kilometres ahead of the fire, creating spot fires that will move quickly in different directions."
Crews from the Rural Fire Service spent Wednesday battling more than 80 fires across the state, with 50 uncontained.
Emergency warnings have been issued for both bushfires, and some people have been told it is "too late to leave".
Police are reminding members of the public to check with the NSW Rural Fire Service before lighting fires as Total Fire Bans may be in place.
The fire is now moving in an easterly direction.
Strong winds and dry conditions are now making flames spread in Ulladulla and Bega Valley in New South Wales (NWS), Australia.
A bushfire burns in Milton near Ulladulla on the NSW South Coast.
A very high fire danger and winds up to 70km/h are expected on Thursday for the New England, Northern Slopes and Far North Coast regions - including near Grafton and Lismore. More than a dozen outbuildings were also destroyed across the region.
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Earlier this week, Watts' told reporters he had no idea where his family could be, and he pleaded for their safe return. In another motion, Merson asks that DNA samples be taken from the hands and nails of the body of the girls' mother.
"It had been burning for a few days, but we weren't concerned at all", he said.
Firefighters are working to slow the bushfire's spread and establish containment lines, according to the RFS.
"Tully had a wealth of aerial firefighting experience and his aviation knowledge and skills were of the highest standard, he was regarded as one of the most experienced fire bombing pilots in the industry", chief pilot Mark Harrold said in a statement.
The RFS said favourable conditions on Friday helped firefighters backburn and use other methods to contain the blazes.
"We are concerned about a return to these gusty conditions on Saturday", he said.
Commissioner Shane Fitzsimmons said the activity was extremely concerning.
"Don't be the fire risk to your community, know your obligations if conducting burns and know the costs if you do the wrong thing", Mr Fitzsimmons said.
"It is a really early start to these severe fires, and it's only really been three months since the last serious fire we had, which was in April".