More than 90 NSW bushfires still burning - NEWS.com.au

NSW firefighters are urging people to keep up to date as fires can change at any moment. Source: AAP

SEVERE weather fuelling bushfires across NSW has eased in some areas but at least 90 fires are still burning with one advancing on more than a dozen properties.

The blaze at Kybeyan Valley, 20km east of Cooma, advanced on approximately 15 properties that came under threat on Saturday.

The blaze has scorched more than 9800ha of bush and grassland and continues to burn out of control.

The Rural Fire Service (RFS) issued an emergency warning about 5pm (AEDT) for the affected properties in the Countegany and Kybeyan areas of the blaze.

"People should shelter in place as the fire impacts property," an RFS spokesman said, adding that it was too late for people to leave.

Nearly 100 firefighters worked to contain the further outbreak with the assistance of aircraft waterbombing the areas.

A southerly change was expected over the area, prompting concerns that smoke would descend on Cooma.

A fire 12km west of Sussex Inlet, on the state's south coast, continues to burn out of control.

Nearly 200 firefighters are working to strengthen containment lines as smoke affects the Princes Highway.

Another blaze 11km west of Yass, north of Canberra, continues to burn with a perimeter of around 100km.

Firefighters have contained the 15,000ha blaze but threats to isolated rural properties remain if embers spark additional fires.

RFS commissioner Shane Fitzsimmons said weather forecasts were optimistic for the early part of the week but the absence of rainfall meant the landscape will remain susceptible to fire.

"We need to remain vigilant," Mr Fitzsimmons said.

A total fire ban was in place for Saturday which eased for Sunday to take in all coastal areas, the far southeast, the New England region, the southern Riverina and the state's far southwest.

On Sunday, temperatures will soar into the 40s in western parts of NSW while the Hunter, mid north coast, northern rivers, northern tablelands and central tablelands will experience high 20s to high 30s.

The Riverina will get to the high 20s while the Illawarra, the south coast and the Snowy Mountains won't climb beyond the mid-20s.

The Sydney metropolitan area will hover between the mid-to-low 20s.

A total of two men and three boys have been charged with deliberately starting three fires in the Sydney area.