More rain and possible a possible thunderstorm has been forecast for Mandurah today with residents warned to prepare for the downpour.
It was a night of wild weather with 38.8mm of rain recorded since yesterday morning and wind gusts reaching 89km/h around 11pm last night.
Today residents can expect squally showers with the chance of a thunderstorm during the morning and afternoon.
Winds are expected to reach 35-45km/h north-westerly tending westerly at 40-50km/h this morning.
Western Power said around 10,000 homes were left without power following last night's storms, with half of those residing in the south network, including Safety Bay.
Around 1,500 customers have been disconnected from power in Orelia, with the service expected to be restored later this morning.
The Bureau of Meteorology has advised a deep low pressure system will move eastwards to the south of the State, with winds increasing again during this afternoon and evening for today.
The Department of Fire and Emergency Services has urged the public to prepare for more wild weather.
It said motorists should exercise caution on the roads today and to use hazard lights while driving if rainfall is heavy.
For people outdoors today DFES said to find safe shelter away from trees, powerlines, storm water drains and streams.