Multiple fire crews have battled large blazes at a petrol station and a factory in Sydney's west overnight.
Dozens of workers managed to escape from a plastics factory in Smithfield after a fire broke out just before 4am on Thursday.
More than 100 firefighters and 25 fire trucks were sent to battle the blaze, which raged through part of the pipe-manufacturing factory and burned through the building's roof.
It was classified as a 10-alarm emergency at its peak, the most severe type of fire.
Crews managed to bring the blaze under control within two hours and it was extinguished later on Thursday.
No injuries were reported, but firefighters and specialist technicians continued to work to contain asbestos and a supply of chlorine gas at the site.
Investigators are looking into the cause of the blaze.
In the nearby suburb of Fairfield, investigators are also examining the scene of a fire at a petrol station where multiple 200kg LPG cylinders exploded.
About 6.30pm on Wednesday, crews arrived at the station to find a large, intense fire threatening to spread to nearby homes.
Residents rushed to safety as firefighters cooled the venting gas cylinders.
The blaze was brought under control after three hours, saving neighbouring homes and preventing flames spreading to the service station's fuel tanks.
Fire investigation crews will work with police forensics officers on Thursday to determine the cause of the blaze.
