WA storm cuts power to thousands as wild weekend weather continues

Strong winds ripped the roof off a coastal apartment block in Bunbury, prompting a warning to nearby residents. (ABC News: Neve Brissenden)

More severe weather has battered southern WA, with trees and power lines brought down by strong winds and emergency crews dealing with hundreds of calls for help.

More than 47,000 Western Power customers have been hit by outages, with over 250 storm-related outages in the South West.

Fremantle's WA Day festival has been cancelled, and storm warnings remain current across a large swathe of the state.

Tens of thousands of homes are without power and emergency services have received hundreds of calls for assistance after a series of powerful storms tore through the southern half of Western Australia over the weekend.

Cyclone-strength winds were recorded in some areas, including Cape Naturaliste where there was a gust of 135 kilometres per hour, as trees were toppled and fences blown over.

A tree fell on a house in the Perth suburb of Greenwood during last night's storm. (ABC News: Samantha Goerling)

An SES crew spent this morning working to remove a tree and fix the roof of a Greenwood house. (ABC News)

An apartment block was severely damaged in South Bunbury, with roofing torn off the building and windows smashed.

A warning was issued for residents in nearby streets to stay inside as the storm passed overnight.

Another apartment building in the coastal Perth suburb of Cottesloe had part of its roof torn off, damaging nearby properties.

Parts of the apartment building's roof were left strewn around the property. (ABC News: Jasmine Hughes)

Residents near the Hawkstone Street apartments were also told to stay indoors, with authorities warning of the risk of roofing materials and debris from the site becoming airborne in strong winds.

Storm warnings remain current across a large swathe of the state, from the Mid West Gascoyne through to the Great Southern, and including the Perth metropolitan area.

This car had been crushed by a tree in the northern Perth suburb of Greenwood. (ABC News: Samantha Goerling)

The storm damaged homes and brought down fences, including at a property in Thornlie in Perth's south-east. (Supplied: Jason Abuso)

A home in the Perth suburb of Peppermint Grove was damaged when a tree came down on it. (ABC news: Mya Kordic)

The Department of Fire and Emergency Services said despite the storms easing, conditions remained hazardous and people should stay away from damaged buildings, fallen trees and powerlines.

Two people have had a lucky escape after a tree fell onto their car on a majo