More than 11,000 homes in Perth are without power on Friday afternoon as thunderstorms and strong winds lash the city and parts of the southern coast.

Western Power crews are responding to a large number of outages, mostly in the suburbs of Aveley, The Vines, Ellenbrook, Wandi and South Guildford.

Western Power crews repairing fallen power poles. Credit:Western Power

By 3.30pm, power to 4000 homes had been restored.

More than 5000 residents remain without power in The Vines and Aveley.