The state is expected to be hit with the wildest autumn weather in years, as the remnants of ex-tropical cyclone Mangga collide with a cold front and trough, whipping up damaging wind gusts of up to 100km/h for almost the whole coast.
About 62,000 properties have experienced power outages across WA over the past two days, with 22,000 still without electricity.
The Education Department says dozens of WA schools lost power.
Tourist hotspot Margaret River was also completely without power for some time.
Some homes have also been damaged by fallen trees throughout the state.
State Emergency Services staff have answered hundreds of calls for help overnight and this morning.
In Kalgoorlie, a shed was swept up by the wind and landed in a sub station, knocking out power to 15,000 homes.
The roofs of a couple of small shops in Bedford have crumbled while fallen trees crushed fences at Campbell Primary School in Canning Vale.
Even Perth's famous Crawley Edge Boatshed, a popular social media snap on Instagram, is going underwater, with its jetty already submerged.
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Western Australia (WA) is in for a second day of wild weather, with the south bearing the brunt on Monday.
The storm, which is expected to continue well into Monday, was described by Bureau of Meteorology state manager James Ashley as a "dynamic and complex" weather formation caused by ex-Tropical Cyclone Mangga interacting with a cold front.
There are now reports emerging of crops lost in the state's north.
Wind speeds reached 132 kph (82 mph) at Cape Leeuwin, the fastest for the month of May since 2005.
Australia's Bureau of Meteorology warned of abnormally high tides and damaging surf spanning a distance of roughly 3,000 kilometres, from Albany to the Kimberley Coast.
Much of the agricultural areas are likely to receive falls in the range of 10-20mm.
"This is a rare event for Western Australia, particularly due to the extent of the area affected and the possibility of multiple areas of unsafe weather", the Bureau of Meteorology said.
The weather bureau is warning over possible flooding and significant beach erosion, as the high winds combine with sea swells and waves.