Freezing rain has caused several downed trees and power lines, causing spotty outages from Fred Meyer to the Issaquah School District administration building on Holly Street.
The trees have caused several roads to close, including 56th and SR 900.
Puget Sound energy reports about 100,000 customers are without power in King County.
PSE customers can call an automated phone system at 1-888-225-5773 to report power outages and hear about service updates.