I can see much of the port area from my office in the Seattle Municipal Tower. The only signs of unusual activity I see are a couple of helicopters hovering over the area. Oddly, just the other night I had a dream of seeing several explosions in the waterfront/downtown area, as I looked out my office window.
The 4:00 KOMO TV update said it is still not clear what set the dogs off - and that the containers are still being inspected - bomb squad still on site and terminal still closed including incoming to all ship traffic. This isn't over yet.