Updated February 23, 2013 14:38:22
Firefighters across Perth were kept busy on Friday night with dozens of pole top fires caused by light rain.
Authorities say water combining with dust on the top of the poles sparked the fires.
Western Power says more than 20,000 properties lost power across the city.
The worst affected areas were Hamilton Hill, Balcatta, Bassendean, Atwell, Coolbellup and Eden Hill.Topics: electricity-energy-and-utilities, industry, fires, perth-6000 First posted February 23, 2013 13:31:44