Dash cam footage video from a trooper's patrol car in Oregon captured the moment a fire-damaged tree fell on his vehicle.

The trooper was responding to a call when his vehicle was struck by a falling tree that crossed state highway 22 in a level three evacuation area, police said. In the video, the tree appeared to suddenly descend onto the highway under the cover of an acrid yellow-green smog that officials say could linger for weeks.

"Our Trooper was lucky and wasn’t injured, but it could have been so much worse," Oregon State Police wrote on Facebook.

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Authorities used the incident as a warning towards residents on how evacuation areas are still closed to the public.

"These areas are deemed unsafe," the law enforcement agency wrote.

The patrol car after a fire-damaged tree fell onto a trooper's vehicle

The patrol car after a fire-damaged tree fell onto a trooper's vehicle (Oregon State Police)

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Local law enforcement, as well as the Oregon National Guard and Oregon Department of Transportation, "are just a few of the entities manning roadblocks around the state," police added.

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Residents are advised to contact their county directly for more information on evacuation area access.