A severe storm hit the Wheatbelt town of Corrigin overnight damaging homes and sheds and bringing down trees and power lines.
Many businesses have been hit, including the local hotel which lost its roof.
Western Power says the network sustained significant damage and up to 500 homes and business had been without power.
Generators were brought in for the hospital and businesses in the main street, including the supermarket.
Additional crews from Perth and surrounding regions helped repair powerlines.
Western Power says most customers are now back online.
Farmers reported a brief heavy downpour of rain with some receiving up to 50 millimetres.
Farmer Adam Rendell says the brief storm caused considerable damage on his property.
"I lost a machinery shed roof and a wall was just blown straight out of it and a little cottage roof and another little shed roof went as well," he said.
"A lot of tree damage mainly on fences, so a huge amount of trees down."
© ABC 2013
10:43 EDT A spectacular electrical storm over Perth overnight has blacked out more than 27,000 homes and businesses and caused flight delays.