Marysville Firefighters were called to the 1600 block of Vermont Street shortly before 4:00 a.m. Wednesday. Upon arrival, crews reported, flames were visible in the upper story of the home. One person had been inside the residence, and had evacuated before the fire crews’ arrival. The upper story of the home was severely damaged by flames. Marysville police and department of public works employees assisted at the scene. Units from Tri-Hospital EMS and the Port Huron, Port Huron Township, St. Clair and Kimball Township fire departments also responded. Crews remained at the site well into the afternoon investigating the cause of the fire.