Power to about 547 Puget Sound Energy customers was expected to be back on by 5 p.m. Monday, Sept. 7.
What caused the outage was under investigation, according to the PSE outage map.
The outage was reported at 1:50 p.m. and affected at least 2,170 customers.
The remaining customers without power were in an area off Portal Way.
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PSE couldn’t immediately be reached for comment.