articleThe Brief A wood burner malfunction caused a massive explosion and fire that destroyed a 12-by-30-foot shed and damaged an attached barn in the Town of Waupun. An explosion and fire gutted a large shed in the Town of Waupun on Wednesday, Jan. 28. Shed fire investigationWhat we know:A news release from the Fond du Lac County Sheriff’s Office says dispatchers received multiple 911 calls reporting a loud explosion at a property on Center Road in the Town of Waupun, Fond du Lac County. Preliminary causeDig deeper:A preliminary investigation indicates the explosion was likely caused by a malfunction of the wood burner, which led to the shed fire. However, it remains under investigation by the Fond du Lac County Sheriff’s Office.