The storm, driven by the season’s first major atmospheric river, inundated the region, killing at least three people and causing widespread power outages.

One of the strongest storms on the West Coast in decades knocked out power for thousands of people and unleashed strong winds that toppled trees and left two dead in Washington before making its way through Oregon to Northern California.

Heavy rain from a major storm prompted evacuation warnings for communities near a Northern California river that forecasters say could break its banks Friday, as the system continued to dump heavy sno