A bushfire that has burned nearly 1,000 hectares in Sydney's south-west remains out of control but has been downgraded as conditions ease and crews begin back-burning operations.
It's unclear if Friday's fires reignited on Saturday or if someone may have deliberately lit the blaze which has now burned through nearly 2500 hectares of bushland focused on the Holsworthy military range.
Conditions eased late last night, but predicted high winds on Monday afternoon could cause trouble for hundreds of firefighters still attempting to slow its spread on the ground. The fire has ripped through 2500 of land in Sydney's southwest.
The threat to properties has reduced but "winds will strengthen across the day", the service warned.
Firefighters worked through the night to backburn areas around Heathcote Road near Pleasure Point, as well as the Holsworthy military base.
The blaze, which has been burning since Saturday, was downgraded from emergency to watch-and-act status overnight, but it has flared up again.
Once pristine bushland has been ravaged by the fires.
The bushfire threatened homes in Sydney, with some locals being forced to evacuate their homes over the weekend, while others were told it was too risky to leave.
"We have had reports of impact on properties in west Menai and Barden Ridge but our crews at the moment are exclusively focused on fighting the fire", he told AAP.
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"Residents in Illawong, Bangor and Picnic Point are experiencing ember attack and should continue to monitor for any new spot fires in the affected areas".
One Menai resident, Erin Stevens, left her home yesterday evening.
"It was pretty scary", he told AAP when finally opening a beer, thankful his house came with sprinklers on the roof.
Conditions are expected to aid the firefighting effort on Monday, with winds about half the strength they were on Sunday.
The fire had threatened homes in south-west Sydney on Saturday.
"Still quite a hard day ahead (on Monday)", he told Nine Network.
Reports say the unseasonably hot weather of the last few weeks is partly to blame, though police are also investigating what started the blaze and are appealing for witnesses.
"I think we've got a long way to go before we're out of the woods", he said.
Heathcote Road remains closed to motorists between Macarthur Drive and New Illawarra Road.