The Shire of Kondinin says, while it is too early to know the total cost of a storm which devastated the small town of Karlgarin, it will be significant.
Tuesday evening's storm tore roofs off nearly 10 buildings, while the shire estimates about 90 per cent of the town's buildings received some damage.
Shire chief executive Peter Webster says authorities will continue assessing the damage in coming days but the town is likely to face a substantial cost.
He expects it will take authorities several days to clean up the damage.
"We'll have the shire roads to tidy those up a bit," he said.
"We're cleaning them up but we're only just opening them up, pushing the trees to the side of the road, so we need to go back and pick those up.
"That'll be probably over the next week we'll be tidying things up.
"We've managed to get most of the townsite cleaned up.
"There's a couple of chaps from DFES [the Department of Fire and Emergency Services] in Albany have turned up and they're doing some checks on the property damage around the Karlgarin townsite as well as within, checking on the damage to property and whatever, so things are coming together quite nicely."
Many residents in areas affected by the storm, including Karlgarin and Newdegate, have spent their second night without electricity.
Although Western Power says most faults have been restored, the utility expects it will take some time to restore the network because of the widespread damage.
It estimates power will be restored in Karlgarin by 2:00pm (AWST) today.
The Shire of Bruce Rock was also affected yesterday by a severe storm, which brought more than 40 millimetres of rain in a short period and strong winds.
Shire chief executive Steve O'Halloran says the clean-up will take several days and residents need to be cautious during that period.
"Just drive to the standard of the road," he said.
"We haven't actually closed any of our roads because of rain damage but you never know when a tree can fall over, so you need to be aware in case something happens quickly.
"We've got a crew out cleaning up roads and trees, we seem to be fairly lucky that we haven't had any reported structural damage but there's a lot of tree damage throughout the shire, so our crew are out cleaning trees off roads."
© ABC 2013
13:51 EST Thunderstorms will develop across southern parts of Western Australia during the next few days but for many places will bring little rain, just whip up some dust.