Concord Fire and Police Departments along with numerous mutual aid resources are working at a 3-Alarm structure fire in progress on Fairhaven Hill Rd. Numerous media helicopters may be observed in the area. A large volume of smoke is also in the area along with discolored water. Please refrain from calling Concord Police regarding reports of low-flying helicopters, reports of brown/discolored water or with any questions. There are no further updates at this time.