Compromised levee forces evacuation of Tyler Island in Delta; unrelated to Oroville

Sacramento County advised residents in the Tyler Island area south of Walnut Grove to evacuate Monday due to a compromised levee.

About 20 homes are in the area, said Sacramento County Water Resources spokesman Matt Robinson. Tyler Island is protected by a ring levee.

The county expected imminent failure of the North Fork Mokelumne River levee, the National Weather Service warned early in the afternoon. Robinson said there was some disintegration on the land side of the levee but no water has gotten through. Workers are piling rocks at the weakened point to shore it up, he said.