Firefighters are expecting a "pretty horrible" day for bushfires on Saturday as more extreme weather hits NSW.
A total fire ban across the state has been extended for a further 24 hours through Saturday, with temperatures predicted to soar into the 40s again in many parts of NSW.
NSW Rural Fire Service said the hot forecast meant it would be another tough day for firefighters, who on Friday night were battling around 98 fires, of which 16 remained uncontained.
"We are looking at some pretty horrible conditions tomorrow across the southern part of the state but not all of the state," an RFS spokesman told AAP.
"We've got a grip on most of these fires and are doing some burning overnight to tie these fires in, but will be tested by the wind and weather conditions tomorrow."
The spokesman said strong westerly winds heightened the bushfire risk for Saturday.
He said the fires that would cause the most concern were the Deans Gap fire in the Shoalhaven, the Cobbler Road fire near Yass and the Yarrabin fire in the Cooma-Monaro region.
More than 230 firefighters were on Friday night working to contain the Yarrabin fire, which has now burnt through more than 9,800 hectares of bush and grass.
Firefighters were working to strengthen containment lines around these fires before things heated up Saturday, the RFS advised.
"We're doing that in the hope the fires stay in their box," the spokesman said.
