Emergency warning for WA bushfire

An emergency warning is in place for an area near Harvey in WA.

One house and several cars have been lost in a bushfire in Perth's east. (AAP)

Residents in the Western Australian town of Harvey have been told to evacuate as a bushfire rages nearby.

The DFES warns fire conditions in the areas of east of Waroona, Hamel, Cookernup, Yarloop, Harvey and surrounding areas in the shires of Harvey and Waroona have escalated and could be impacted within the next four hours.

People in Preston Beach have also been told it's not safe to leave and they need to actively defend their home or take shelter at a safer place.

Earlier, an emergency warning was issued for the Dalyup area, west of Esperance, in the state's far south.

Homes near Murray Road are under threat by fire, with flames higher than roof tops, DFES warns.

The blaze was reported on January 4 and has burnt about 3000 hectares.

The cause is a reignition of a previous fire caused by lightning.