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Hundreds have fled as the blaze bears down north of Lancelin.
The DFES issued the warning for parts of the Gingin and Dandaragan shires, saying residents of Ocean Farms Estate need to leave their homes immediately.
People can monitor the DFES site for updates here.
An emergency warning has been issued for a bushfire burning north of Perth.(9News)
By this evening, 270 residents had left the estate.
A second aerial tanker has flown in from Victoria to help the situation, with 200 firefighters on the scene.
Authorities said the blaze was moving at up to 3.5km/hr and had burned through 6500 hectares since it started in Red Gully on Saturday.