UPDATE: THERE have been 42 calls for assistance after heavy rains and strong winds smashed parts of Perth and the South West this morning.
The wild weather hit the South West from 7am to 8am before hitting Perth just before 11am and then Albany between 11am and noon as a cold front passed through the state.
Bureau of Meteorology duty forecaster Megan Colangelo said the cold front had now moved through the city but we could expect more showers and gusty winds for the remainder of the day as the cold air behind the front followed.
She said there was still a chance of a thunderstorm and hail this afternoon, but the storm was expected to ease by the late evening.
Perth has been hit by 14mm of rain since 9am, while Mandurah has received 8.6mm, Swanbourne has had 11.8mm, Garden Island has had 13mm, and 11mm has fallen in Jandakot.
Meanwhile in the South West, Pemberton has been smashed by 40mm and Dwellingup has been drenched by 40.6mm.