Cambridge Ontario Fire dispatch received a call reporting a fire on Sheffield Street March 28, 2016 at 03:37. Four stations responded to the call in a large abandoned storage shed. P2 arrived on scene and reported a steel-sided warehouse fully-involved with flames 30 feet in the air. A1 set up in front and used their tower plus numerous 2.5 inch lines were pulled to knock the fire down. The fire was declared out at 5:30. A backhoe was brought in later in the morning to tear the remaining structure down. Severe thunderstorms had rolled through the region an hour before this call. Cause was undetermined. Box 690 on scene four hours providing rehab.