The Rural Fire Service is calling on the public to be vigilant today with a severe fire danger forecast and total fire ban in place across New South Wales.
Total fire bans are in place for Sydney, the Hunter region, the north coast, New England and the northern slopes.
Overnight, crews attended fires in the Great Lakes, Taree and Port Macquarie areas.
Of the state's 40 reported fires, 17 remain uncontained with the Bureau of Meteorology forecasting very dry, warm to hot northwest winds with temperatures expected to reach the 30s.
Hundreds of firefighters have been working all week to contain the blazes and extra water bombing helicopters are being brought in as a precaution as the RFS works to strengthen containment lines.
RFS spokesman, Brendan Doyle, says there is no danger to property at the moment, but has warned people with fires burning near their homes to be alert to potential danger.
"There's no properties under threat at either of these fires but what we're asking people to do is just stay up to date with information," he said.
"So throughout the day from lunchtime we're expecting those temperatures to reach their maximum temperatures late in the afternoon.
"So people just need to be aware that as the day goes on and temperatures increase that we will see an increase in fire activity at those fires.
"We don't need them to be alarmed. We want people to stay up to date with information."
Residents in the Shallow Bay region have been told to closely monitor a fire along Shallow Bay Road which has burnt out 200 hectares.
A bushfire east of Walcha is burning along Bloomfields Road and Kangaroo Flat Road.
Fire workers are battling to contain a fire along Lorne Road and their containment lines will be put under pressure if the wind picks up.
People living around Old Bar Road have warned to leave their homes.