Multiple units are responding to an active structure fire at a single family home in Monona. The fire is at 505 Frost Wood Road, according to Dane County dispatch. Smoke is coming from the roof of the home. People were home at the time of the fire when they smelled smoke and called the fire department, officials said. There were no injuries. Firefighters are responding from Monona, McFarland and Madison stations. Monona police are also at the scene.