Milder conditions help NSW firefighters

Firefighters have worked through the night to contain several bushfires across NSW, with milder conditions and easing winds bringing reprieve after a tough day.

More than 1200 firefighters along with 350 fire trucks spent Wednesday battling several out of control fires.

Blazes near Cessnock in the NSW Hunter Valley are at an advice level after patchy rain helped firefighters contained them overnight, said a NSW Rural Fire Service spokesman on Thursday.

No homes were destroyed by the Kurri Kurri blaze, although some sheds and outbuildings were damaged.

A woman and her young daughter had to be airlifted from a burning Kurri Kurri property to Cessnock airport in distress after an RFS helicopter was waved down.

The fires though are being treated as suspicious.

RFS spokesman Matt Reeves said a bushfire near Parkes, in state's Central West, which was of most concern overnight is now at a watch-and-act stage.

Further south, a fire near Tarago, northeast of the ACT border, has destroyed at least one rural homestead, but crews have worked overnight to contain the blaze.

While at Sutton, also near the border, a blaze that burnt 520 hectares has been contained but there are reports of livestock and building losses.

Wednesday's fires came as temperatures in parts of western Sydney and the Hunter hit the mid-40s.

NSW firefighters will take advantage of the lower temperatures across the state on Thursday, until the next wave of hot weather arrives next week.