A historically strong bomb cyclone killed at least two people and caused a mass power outage that could last for days after it slammed the Pacific Northwest and Canada’s British Columbia with destructive winds.

A bomb cyclone and an atmospheric river will continue lashing the Pacific Northwest with severe weather conditions, the National Weather Service said.

At least one person has died and hundreds of thousands are are without power Wednesday as a powerful bomb cyclone approached the Pacific Northwest and Northern California, causing high winds and heavy rain and snow.