More lightning strikes in NSW could add to the almost 90 fires burning across the state on Sunday.
About 900 firefighters have been deployed across NSW to battle 50 new fires sparked on Saturday night after lightning activity.
One blaze burning at Minnimbah, near Wagga Wagga, threatened the small village of Humula and surrounding properties on Saturday night.
An emergency warning was issued for the residents in the area but the fire has since been downgraded to a watch and act level.
The out of control blaze has burnt through 7200 hectares.
There are unconfirmed reports properties have been lost.
With further lightning forecast, the Rural Fire Service (RFS) is concerned about new flare ups.
"Obviously we are concerned about new fires again that would have come from lightning," RFS deputy commissioner Rob Rogers told ABC radio.
"The number of fires that we're trying to deal with is just going up alarmingly."
The Bureau of Meteorology forecasts the chance of thunderstorms from Sunday afternoon for the central tablelands and south west slopes.
Residents affected by the Minnimbah fire, which is burning in the Murraguldrie State Forest, should be aware of a potential wind change that would see the fire threaten the Humula village again, the RFS says.
Fire crews and aircraft are also protecting properties near a fire at Minjary, in the state's Riverina.
The fire has burnt more than 500 hectares.
RFS spokesman Matt Sun said 86 fires were burning across NSW, with about 20 uncontained.
He said there was a lot of work going on to build containment lines around the two major fires.
But Mr Sun warned the situation could change as the afternoon progressed.
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