Fire crews battling raging bushfires in northern NSW are working through the weekend to get the blazes contained before forecast hot weather.

The NSW Rural Fire Service says so far 22 homes have been destroyed, 15 houses have been damaged, 73 outbuildings destroyed and 21 outbuildings damaged.

There were 25 bush and grass fires still burning across NSW on Saturday morning, with eight yet to be contained.

The major fire grounds are at Wallangarra, nearby Tabulam and Tingha Plateau, all in the northern part of NSW.

The latter two blazes are at Watch and Act advice level.

The Bruxner Highway fire at Tabulam is considered out of control, having burnt through more than 4200 hectares of land.

Dangerous trees along the highway are being assessed with the assistance of Roads and Maritime Services.

“Crews will today undertake back burning to strengthen containment lines,” NSW RFS tweeted on Saturday.

“They will be supported by water bombing aircraft.”

Firefighting crews from Queensland have also been brought in to assist.

The Tingha Plateau fire has burnt more than 22,000 hectares of bush, however strong winds predicted to impact the area on Friday night did not eventuate.

Topper’s Mountain Wines, near Tingha, said the fire had devastated “about 80 per cent” of the vineyard, including photos of their charred crop.

“Embers travelled 500 metres from our Mount Topper State Forest boundary to the vineyard to ignite the grass. Once in there, we couldn’t stop it,” the Facebook post on Thursday night said.

The winemaker said its Vintage 2019 is “gonski” after smoke taint ruined the fruit that had been destined for wine.

Affected residents are being asked to monitor the situation in their area, follow the advice of firefighters and “know what you will do” if the fire approaches.

Evacuation centres have been set up. Those who fear their life is at risk are urged to call triple zero immediately.

Temperatures on Saturday are expected to range from the mid-20s in coastal areas to mid-30s inland, but any reprieve could be short-lived with hotter weather expected to sweep up through the interior of the continent on Monday and Tuesday.