PG&E has restored power to 9,000 San Lorenzo customers who had their electricity service disrupted by the light drizzle earlier today.
The outage happened about 12:45 p.m. Most people had electricity back about 1:30 p.m. All customers had power returned by 2:30 p.m.
PG&E officials said the outage was caused when today's light rain mixed with the dust and dirt that had collected on the utility's power lines. The result is a mud-like substance that can cause arcing in the lines.
Heavy rains don't cause this problem because they wash the dirt from the lines.