From the Seattle Post-Globe:
About 4,657 customers lost power at about 6:20 p.m. The cause is unknown and the estimated time of power restoral is undetermined. Affected areas include parts of Rainier Beach, Beacon Hill and Seward Park. The general boundaries of the outage are S. Alaska St. on the North, S. Norfolk St. on the South, Lake Washington on the East and Airport Way S. on the West.