With sub zero wind chills at 0941 hours the Manchester, Ct Fire Rescue EMS Department responded to 61 Theresa Rd for a report of an explosion and fire. On arrival the members had heavy smoke showing from the garage. One occupant was transported to the hospital and two cats were rescued. With the front walks not shoveled it created a challenge for the members to get a line in the front door. Mutual aid assisted at the scene and covered the MFRE stations.