Storm damage has left thousands of Perth residents without power, while authorities warn an unusually severe front is set to hit the city and a large part of WA on Wednesday evening. A strong cold front and damaging winds are expected throughout an area bounded by Jurien Bay to Southern Cross to Eyre, including York, Esperance, Albany, Katanning, Narrogin, Bridgetown, Bunbury, Mandurah and the Perth metropolitan area overnight. A Department of Fire and Emergency services warning on Wednesday afternoon said: "This is unusual weather that could cause damage to homes and make travel dangerous." SES volunteers answered 18 calls for help in the Perth Metropolitan region on Wednesday and one in the Goldfields Midlands. Western Power have identified Duncraig, Greenwood, Beechboro and Brabham as some of the worst affected suburbs by severe weather throughout the day. "A severe weather front has crossed the coast bringing with it powerful winds that have brought down trees and blown debris into powerlines affecting power supplies," Western Power said in a statement on Wednesday evening. "Western Power crews are currently assessing the damage to the network." By 7pm, Western Power said it had restored electricity to around 6000 homes and that it was working to restore power to around 2300 customers Lockridge, Bindoon and Eden Hill areas. Widespread damaging winds of up to 100km/h are expected throughout the warning zone overnight. "Dangerous" gusts in excess of 125km/h could cause significant damage or destruction to homes or property in isolated areas east of Southern Cross to Esperance. The winds are expected to ease overnight.