On April 3, at approximately 0800 hours, Fire Board alerted units for the motor vehicle collision with reported vehicle on fire and people trapped in the 27600 block of Mechanicsville Rd at Harding Way. Squad 2 and Rescue Engine 22 responded on the call. Enroute, Fire Board advised units the driver had been removed and there was a report of a child still trapped in the vehicle. Safety 2 (Krabbe) arrived on the scene and confirmed there was a single vehicle into a tree, on fire, and that the driver had been removed. Safety 2 established the Mechanicsville Command. Squad 2 arrived and extinguished the fire, notifying Command that there were no other occupants of the vehicle. It was confirmed that the driver was the sole occupant and there were no other injuries. Ambulance 298 (Mechanicsville VRS) and Paramedic Ambulance 1002 (Charles County Department of Emergency Services/Hughsville VRS) treated the patient and requested aviation due to the severity of injuries. Engine 24 handled the landing site. The patient was flown to a local trauma center by Maryland State Police Trooper 7 with life threatening injuries. The scene was turned over to St. Mary's County Sheriff's Office for investigation and reconstruction. SMECO also responded to ensure there was no damage to their pole or lines. All fire and EMS units returned to service within an hour.