DENVER (AP) — Parts of Colorado and Wyoming remain paralyzed in the wake of a massive late-winter blizzard that swept through the two states.

The storm knocked out power to tens of thousands of homes and businesses, closed hundreds of miles of highway, stranded thousands of motorists, shut down airports and contributed to the death of a Colorado State Patrol officer who was hit and killed by a car while helping another driver.

Major highways in the two states remained closed Thursday morning as blizzard conditions persisted in some areas and crews continued searching for stranded motorists and worked to clear the roads. Denver Airport reopened but more than 600 incoming and outgoing were canceled early Thursday before operations could resume. Schools and government offices remained closed or delayed reopening Thursday.

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