PORTSMOUTH, Va. (WAVY) -- Portsmouth firefighters responded to a house fire early Sunday morning. One of those first responders was taken to the hospital, but is expected to recover. Around 3 a.m. on Sunday, Portsmouth Fire-Rescue crews said they responded to a multifamily structure fire on Calvin Street. When they got to the location, they saw a single-story multiplex with smoke and flames coming from an end unit. Two of the three units were unoccupied. Crews said an adult and a child were able to get out safely. An official with the fire department said one firefighter was taken to the hospital. The cause of the fire is under investigation. Stay with WAVY.com for more local news, weather and traffic.