Derrimut fire, Melbourne: Chemical explosion sparks large factory fire

Communities in Melbourne's west are being warned to look out for smoke after a factory was engulfed in flames following a large chemical explosion.

Firefighters were called to the fire at the Swann Drive address in Derrimut, about 30km from the Melbourne CBD, about 11.20am on Wednesday.

A large chemical explosion at the factory has resulted in a large fire that is being tackled by several specialist fire crews including aerial equipment.

A community advice warning has been issued for Albion, Braybrook, Brooklyn, Derrimut, Laverton North, Sunshine, Sunshine West, Tottenham and Truganina.

There is no threat to the community, but people have been urged to monitor conditions.

Drivers in the area have been told to keep their windows up and ventilation on recirculate.

Paramedics are also on the scene.