MZFD was dispatched 1:55 PM to 8704 Sheets Rd in Cerro Gordo for Mutual Aid to a house on fire. MZFD firefighters arrived to find local fire crews engaged in fighting a fully involved house fire. We assisted with fire extinguishment and extensive overhaul. MZFD crews returned to quarters at 5:35 PM. Attached video is from B. C. Hunk's helmet camera.