I live in Seattle’s Ballard area, but work with people on the east side. Big storms blow down branches all the time on the other side of the lake, causing power outages. We have less trees here in Seattle, comparatively, or maybe Seattle power and light is better at tree maintenance, but ya lots of trees = lots of power outages from what I can infer.
Some richer communities on the east side bury their lines so power outages are more rare.