Firefighters have been strengthening containment lines ahead of deteriorating and difficult to predict weather conditions over coming days.
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On Thursday the Badja Rd Forest fire, Big Jack Mountain fire, Creewah Rd fire at Glen Allen and nearby Postmans Trail continued to burn, with NSW Rural Fire Service Superintendent John Cullen saying the prediction of strong inland winds and low humidity was causing concern for firefighters.
There's no certainty where fire will move. Our fires are moving about in all different directions.
- NSW Rural Fire Service Superintendent John Cullen
According to the Bureau of Meteorology, hot air from central Australia will bring heatwave conditions during Friday and Saturday, with a cool change not expected until as late as Monday.
Emergency services have been visiting the homes of residents who could possibly be impacted by fire, especially Tantawangalo and localities between Bermagui and Tanja, and the evacuation centre is set to reopen in Bega on Friday.
"We'll see what weather we get served up, but we have resources here and ready. There's no certainty where fire will move. Our fires are moving about in all different directions."
Superintendent Cullen said hot winds from the escarpment will meet moist coastal winds, with temperatures reaching as high as 44 degrees inland on Saturday, however crews are unsure where these two weather systems will meet, he said.
The Badja Forest Rd fire now covers almost 300,000 hectares of the Bega Valley and Eurobodalla, stretching from Bemboka to Fitzroy Falls, as it joins the Clyde Mountain fire.
Superintendent Cullen said strike teams from as far as Queensland are joining local crews in preparation for the extreme conditions, with firefighters being placed in staging areas.
The bureau is expecting Bega to hit a high of 43 degrees on Saturday, with north to northeasterly winds tending north to northwesterly at up to 30kmh during the morning, then southeast to southwesterly during the evening.
Sunday may see more cloud cover and the chance of a thunderstorm, with winds southeast to southwesterly as high as 30kmh.
The bureau said it is working closely with the RFS to provide local weather forecasts for firegrounds, with a meteorologist embedded at its new state operations centre in Sydney's Olympic Park.
"These meteorologists provide local weather forecasts for firegrounds including information on wind direction and speed, wind changes, rainfall, humidity and temperature," a bureau spokesperson said.
Data for the forecasts is collected via satellites, the bureau's own weather stations and portable weather stations set up by the RFS, they said.
