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LYONS, Colo. — Transportation into the town of Lyons was completely closed off going in and out of the city, as residents huddled on higher ground due to severe flooding.

Boulder County Sheriff Joe Pelle said in a Thursday morning news conference that flooding has also disrupted the area’s sewer plant, and the town has lost fresh water and their market.

The Colorado Department of Public Health and Environment has placed Lyons on a boil water advisory. Officials said no contamination has been detected, but the advisory was put in place as a precaution to protect the public from any possible breach of the drinking water system.

Residents were asked not to drink the water without boiling it first for at least three minutes. Boiled or bottled water should be used for drinking, making ice, brushing teeth, washing dishes and food preparation until further notice.

Colorado State Patrol confirmed that Highway 36 had been closed between Boulder and Lyons, and that the roadway was completely impassable. Highway 66 between 53rd and Lyons has also been closed, as confirmed by our Chris Jose.

There was 10 to 24 inches of rain reported on the road between southbound Highway 7 between Lyons and Estes Park, making it impossible for emergency vehicles to access either city.

The National Guard was called to help bring blankets and supplies to approximately 200 evacuees at a shelter that has been established at Lyons Elementary School.

Downtown Estes Park was also surrounded by water, as seen in the following Facebook post.