Around midnight Co. 63 was sent to the 100 block of Pitney Rd. for an unknown type fire. Deputy 63 arrived and reported a fire on the City Water Dept. property inside of the police impound yard involving at least 4 vehicles. E633 was first in and deployed 2 handlines to attack the fire. E631 supplied 633 with additional water and personnel. Tanker 410-2 Witmer and Tanker 41 Bird in Hand were requested as well for additional water. The incident is still under investigation.