More than half the WA residents still without power after this week's storms are from rural areas.

About 18,000 homes remain without power in Perth and the South West this morning.

Electricity utility Western Power said this morning that crews would focus on restoring power to the worst-affected areas following Sunday's storm, when the fourth strongest wind gust on record hit the state, clocking 146km/h.

Western Power said about 7500 customers in the metropolitan area were still without power. A further 10,700 customers in country areas were yet to be reconnected, mainly in Donnybrook, Pinjarra, Kewdale and Boddington.

Only 300 customers in the Mandurah, Dawesville and Meadow Springs region were still waiting for power.

"Some houses may remain without power for several days as the mop-up continues and Western Power asks for people to be patient and to consider relocating to homes of family and friends that have power," the utility said in a statement.

Western Power, which reconnected more than 150,000 customers in the past 36 hours, urged people to clear or secure any debris from around their homes in preparation for the fresh storm front later on Tuesday.

The West Australian

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