A power outage hit West Seattle City Light customers around 11:48am on Sunday affecting 2951 customers. Restoration was not expected until around 5pm. Outages are often resolved before target times however.
To check the status of the outage look here https://www.seattle.gov/city-light/outages
The outage extends from Myrtle Street SW on the north to 106th SW on the south. 20th SW on the east to 47th on the west. The cause is still under investgation.