Western Power says 'horrific weather conditions' are preventing the utility from restoring power to thousands of customers.
Around 7,000 customers in the south of the state remain without power after last night's storm.
About 3,800 homes and businesses suffered blackouts in Albany and Denmark, and another 3,000 customers lost power in Manjimup, Bridgetown and Margaret River.
One farmer, affected by power outages, says he is frustrated by the information provided by Western Power.
Boyup Brook organic beef farmer, Warren Pensini, was forced to use a generator for a number of days and says he would have preferred to be better informed about the situation.
"It's a little bit frustrating snot knowing when your power is going to come back on," he said.
"We appreciate that Western Power is doing the best they can but sometimes the information flow is possibly not as good as what it could be."
Another Boyup Brook farmer Gemma Lee-Steere says the bad weather has provided some anxious nights.
She says she was particularly concerned for the condition of her sheep.
"Your heart races because you are worried about your stock," she said.
"A lot of people in our district have been shearing as well, so you're worried about full wool sheep that have just been shorn who have had a decent amount of rain and then winds on them."
A Western Power spokeswoman says the latest outages are disappointing as crews have worked tirelessly over the past two days to restore power to 20,000 homes affected by a storm on Sunday night.
She says tough weather conditions, including chest-deep water in some parts, is delaying the efforts of crews.
© ABC 2013
16:38 EST Organisers of the Mulga Bill Quick Shear at Yeoval, in Central West New South Wales on the weekend, were a bit nervous about the weather on Saturday morning; there'd been good rain on Friday night and they didn't have a 'Plan B' if things didn't clear up.