Around 1pm this afternoon, the Norristown Fire Department was dispatched to a building fire on Kohn Street. As the fire reached the 3rd alarm, Rescue 21 and Ladder 24 were dispatched to cover the Fairmount of Norristown. While en route, they were redirected to the scene. Crews stood by and assisted with overhaul. We returned to Lower Merion around 4 pm.