On March 6 the Danbury Fire Dept resopnded to a house fire. Upon arrival the back of the house was fully involved. Squad6 responded to the scene to provide lighting,air, salvage and fire supperssion.The fire was so hot that it cracked the windows and melted the siding off an house and four cars were damaged. The fire started on the porch and extended to the third floor. no injuries were reported. we were on scene for 4 hours.