Heavy rain has swept through Perth this afternoon and the deluge has been matched with strong winds in south-west WA.
Wild winds ripped the roof off a storage unit in Mandurah while power lines and trees were brought down in the South West.
Emergency services answered 40 calls for help with damage reported in Busselton, Bunbury and Augusta.
Perth has recorded 33.8mm of rain since 9am, with the heaviest falls occurring in the late morning and early afternoon.
The bad weather forced the temporary closure of the north and south moles.
Wind gusts of 104km/h have been recorded at Cape Naturaliste, 111km/h at Busselton jetty and 106km/h at Rottnest Island, where 37mm of rain fell up until 2pm.
More than 65mm of rain has fallen at Wilyabrup near Margaret River since 9am while Witchcliffe has recorded 74mm since 7am.
The Bureau of Meteorology said the threat of severe winds along the west coast and Perth metropolitan area had passed but the strong gusts would still be felt throughout the night.
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A severe weather warning remains in place for communities in a line from Margaret River to Mt Barker and Bremer Bay, including Albany. Destructive winds and heavy rain are expected to continue into the evening.
“Once that frontline has moved through, we’re going to be into a period of more persistent rain that will continue until mid-afternoon and after that there will be a bit of a break; in the evening we’ll start to see more thunderstorms coming in," Bureau spokesman Neil Bennett said.
“It’s going to be windy throughout that period and then showers on and off for the rest of the week, although this will be the wettest day and then we’ll start to see more showers coming back towards the end of the weekend.”
Abnormally high tides that may cause sea water flooding of low-lying areas are forecast for the Central West and Lower West and parts of the South West.
The Department of Fire and Emergency Services advised people to close curtains and blinds, stay inside away from windows and unplug electrical appliances.
Do not use land-line telephones if there is lightning.
People whose houses or properties suffer significant damage should call the SES on 132 500.