More than 25,000 homes are without power across Perth as a strong spring storm bringing wind gusts of more than 100 kilometres per hour has knocked trees and branches onto powerlines and caused damage across the city.
The second front of the bad weather hit shortly before peak hour, with traffic lights scattered across the metro area affected by the power outages.
Western Power spokesman Paul Entwistle said lines were mainly affected by trees that have been uprooted and branches broken off.
"We have got extra crews on, for dealing with all the hazards that are called through, we're also working along(side) SES staff," he said.
"We've had a number of, probably a higher than average number of calls from the SES to assist them, to make sure homes are de-energised, where their roofs have been torn off, just to make sure the SES staff can work safely."
He said clusters of areas across the metro had lost power including the inner-north areas of Yokine, Tuart Hill and Coolbinia, northern suburbs including Marmion and North Beach, and southern suburbs including Mosman Park, North Fremantle, and Booragoon.
Suburbs in the Perth hills in the city's east have also gone dark.
Western Power said in a statement the safety of the community was its highest priority, and in hazardous areas, repair work would not begin until any danger was cleared.
The Perth Royal Show has also closed early due to the bad weather, with the traditional planned fireworks display cancelled.
Royal Agricultural Society WA chief executive Peter Cooper said the show was closed in the interests of public safety.
"This is not an easy decision to make, nor one which was made lightly, but the safety of our patrons is our absolute priority," he said.
A statement said patrons affected by the closure would be given a re-entry pass for tomorrow.
Rescue after school damage
One person was rescued after a building was blown over by strong winds at a school in Perth's western suburbs this afternoon.
Emergency personnel attended the Beehive Montessori School in Mosman Park about 3:30pm.
Department of Fire and Emergency Services Chief Superintendent Stuart Wade told ABC Radio Perth firefighters were called to respond.
Wind gusts of more than 100km per hour have been recorded on Rottnest Island and the northern coastal suburb of Ocean Reef.
Close to 100kph were recorded along coastal suburbs including Swanbourne and Hillarys.
Conditions are expected to ease by tomorrow.
