Residents in Tabulam, in north-eastern NSW, are being told it's too late to leave as a large bushfire flares up and threatens properties.

While firefighters gained the upper hand on separate fires in Tingha and Wallangarra overnight, a fresh emergency warning was issued for the blaze along the Bruxner Highway near Tabulam on Friday morning.

Scorched earth after bushfires near Tabulam in north-eastern NSW on Wednesday. Credit:AAP

"If you are in these areas you should shelter now as fire approaches. It is too late to leave," the NSW Rural Fire Service said.

The RFS said 37 homes and 94 outbuildings have been destroyed or damaged.