Update 2:59PM: Reader Shelly sent us the following Tweet:
Traffic signals out at intersection of n 45th & Stone Way in Wallingford. Not good. Busy intersection.
We just received this note from Seattle City Light:
Seattle City Light crews are working to restore power to more than 4,000 customers affected by an outage in North Queen Anne, Discovery Park, and Fremont. The outage appears to be caused by a tree falling into lines. Restoration is expected at 5 p.m.
Sounds like there are also scattered outages in West Seattle.

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Power on, if flickering, basement flooded: eastern Wallyford.
Same here – water in the basement, lights went out just long enough to nuke my DVR. Also Eastern Wally.
If you are work wondering if you have power, City Light has a cool outage map – http://www.seattle.gov/light/sysstat/ This is also available as an app (in the Andriod market, at least)
Just crossed 45th and Stone a few minutes ago (6:30pm) and the traffic light is still not operating.
45th & Stone at 430 was dark and super courteous, but I am not going through again til much later