The 2006 Falk Corporation explosion refers to a large and fatal propane gas explosion at the Falk Corporation facility in the industrial Menomonee River Valley neighborhood of Milwaukee, Wisconsin, USA, on December 6, 2006. Three people were killed and forty-seven others injured. Cars were reportedly flipped through the air and debris scattered over several blocks. The circumstances surrounding the disaster are being investigated. To date, the investigation has uncovered multiple leaks in a pipe running below the building at the center of the explosion, which supplied propane to the heating system for the complex.