MADISON, Wis. (AP) — Emergency management officials say severe storms that swept through southern Wisconsin early Tuesday have damaged dozens of homes and downed trees and power lines in Dane County. Josh Wescott of Dane County Emergency Management says most of the damage was centered on the north side of Verona and the southwest side of Madison. He says the office received initial reports of homes collapsing and others houses with roofs missing. He says the office had not received any reports of injuries. National Weather Service Meteorologist Steve Davis says imagery indicates a tornado likely cycled from Green County into southern Dane County. He said the Weather Service had received reports of downed power lines and trees but no injuries in Green County. Davis says the system had started to weaken Tuesday morning. In Fond du Lac County the Sheriff Office says there were reports of trees down in the Elmore area.