Bega Valley, where three fires were burning at emergency warning levels combined to create their own weather system on Saturday afternoon, recorded a top temperature of 38.6 degrees.
Cooler temperatures are forecast for the area on Sunday, with tops of 28 degrees.
“We’re expecting to see winds continue tomorrow through much of the fire regions, they won’t be as strong as [Saturday] but there will be the added risk of thunderstorms,” duty forecaster at the Bureau of Meteorology Neil Bennett said.
NSW RFS spokesman Greg Allan said a north-westerly change is expected to come through the state on Saturday night.
“It will continue to push fires in a south-westerly direction [on Sunday],” Mr Allan said.
He said that firefighters are unlikely to be able to contain the out-of-control blazes while hot and windy conditions persist.
“We’re doing our best to slow the spread of the fires, conditions are dangerous and volatile,” Mr Allan said.
Mr Allan said the three out-of-control blazes in the Bega Valley were starting to burn towards each other and “creating their own weather conditions” on Saturday.
A dangerous weather warning due to fire-generated thunderstorms was also issued in Bredbo near Canberra, where two fires burned at emergency levels on Saturday.
One of those blazes, the Orroral fire, was downgraded to “watch and act” on Saturday evening.
Mr Bennett said fire-affected communities in Bega Valley and the ACT can expect some reprieve from the weekend’s hot and windy conditions on Monday.
“We’ll start to see cooler air and a bit of a respite on Monday,” Mr Bennett said.
“There’s a chance of quite heavy falls in the Northern Rivers area as we go into Tuesday and Wednesday.”
There will be no total fire bans in NSW on Sunday, also a very high fire danger is expected for seven areas, including Greater Sydney, the North Coast, the Greater Hunter region, Illawarra and the Shoalhaven, Central Ranges, Northern Slopes and the North Western region.
Education reporter at The Sydney Morning Herald