Engines 1, 2 are back home after responding to Cornelius this morning for a working house fire. Shortly before 9:30am Cornelius-Lemley Fire Rescue & Davidson Fire responded to a house fire at 21000 Catawba Avenue. On arrival Cornelius transmitted a working fire, adding our Engine 2 to the call. Minutes later a Cornelius firefighter, on the second floor of the home, transmitted a mayday (firefighter distress call). The mayday declaration automatically added our Engine 1 to the call as well. The firefighter was located and evacuated from the structure & immediately turned over to MEDIC. Very crowded conditions (material, furniture, boxes) in parts of the home made fire attack & movement through the home difficult & a safety issue for firefighters. Evacuation tones were sounded and a PAR was completed (accountability report). Crews shifted to defensive operations until the fire was controlled. Our Engine 2 crew remained on scene for an extended period of time conducting overhaul.