Fire authorities are still trying to manage an out-of-control bushfire that started in the Holsworthy area, around 31 kilometres southwest of Sydney's CBD, on Saturday afternoon.
"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.
Mr Fitzsimmons said it was possible that winds could strengthen again and elevate the fire danger.
The latest update from NSW RFS warned residents in Voyager Point, Pleasure Point, Sandy Point, Alfords Point, Barden Ridge, Illawong, Menai and Bangor to remain vigilant, as winds are expected to pick up throughout the day, which could increase the fire activity.
Despite the fire's size and its proximity to several suburbs, with some locals evacuated from their homes, no properties were known to be lost, the New South Wales Rural Fire Service said.
The bushfire was downgraded to "watch and act" yesterday evening, replacing the emergency warning put in place, and this morning was further downgraded to "advice" level.
Some residents have been instructed to seek shelter as evacuation is now too unsafe.