Within the Stockholm region there are eleven emergency hospitals, six of which can send medical teams to the site of a disaster within fifteen minutes after an alarm. This ensures qualified first aid to the injured at the disaster site. Each team consists of the surgeon and anesthetist on duty and three nurses with special training in emergency medicine, anesthesia or intensive care. The personnel leaving the hospital are replaced by other personnel in the hospital. All members of the team are equipped with special clothing: an overall with dressings and other equipment in the pockets, a helmet and boots and warm underwear, allowing outdoor work at the low temperatures not infrequently met in the Swedish winter (Figures 1,2). Doctors and nurses have special markings, so that they are easily recognized.