Hypothermia
Although Hypothermia is the last step within the M.A.R.C.H. algorithm, it doesn't make it any less of an importance to treat. Significant lowering of body temperature to a point your body can't compensate for can become very dangerous, very quickly, and without being able to warm up quickly the consequences could be dire. Hypothermia can be caused simply by not wearing enough clothing in cold conditions or being stuck in wet clothing in the cold from either sweating or a boating accident.
Help treat those effected by hypothermia with the right tools such as heated blankets for when the worst case scenarios happen, and help improve recovery chances by keeping them warm before and during transport to a medical facility.