Fire crews will stand guard on Sunday night at an industrial complex in Sydney's west where spot fires are still burning after a massive blaze at a storage facility.
Dozens of local residents may have to spend Sunday night away from their homes.
Spot fires are expected to continue burning through the night at an 80-metre by 60-metre storage facility in Fariola Street, Silverwater.
The persistent fires, producing a large amount of smoke, may pose a threat to surrounding neighbourhoods.
NSW Fire Brigades spokesman Paul McGuigan said 75% of the storage facility's roof had collapsed, and crews could not reach fires burning under the rubble.
About 30 people were evacuated after the storage facility containing aerosols, fuel, plastics and other materials erupted into flames just before 9am (AEST).
It sent a cloud of smoke visible as far away as Blacktown and Maroubra into the air.
The cause of the fire is not likely to be known for several days, although arson has not been ruled out and CCTV footage from the area is being examined.
Police have launched an investigation.