Ambulance Resilience Unit to adopt. United States Triage in a multi-scale destruction, disaster, catastrophic, casualty event, such as following a tornado or an explosion in a populated area, first responders follow a similar triage category scale as the US military. The civilian medical industry uses a similar system for triage. Normally medical personnel aren't immediately available on scene. First responders are usually the first to arrive on scene. They could be police, fire rescue, paramedics, or community individuals with disaster training (CERT certified). They are trained to perform first aid, basic life saving and rescue techniques while performing the greatest good, for the greatest number of people. They will rapidly classify victims and sort them into 4 categories, treating quickly as they go. This system is intended to rapidly identify and classify victims for arriving transport or advanced care medical personnel such as doctors and nurses. The local National Guard and other military units responding would be using the military system of triage rather than civilian. The triage categories are general and the names may vary by region of the nation: : Known as walking wounded or uninjured, green classified individuals typically require very little medical aid if any. Their injuries are minor, usually scrapes, cuts, and bruising with normal capillary refill. They can walk, function freely without assistance, are cognizant, and able to respond accurately to questioning. These individuals will sometimes be asked to assist the responder with transport and applying direct aid to other victims. They will afterwards be staged in an area to be checked more thoroughly later. : Yellow individuals require medical attention but it is not needed immediately. Individuals in this category may have cuts, bruises, lacerations, some confusion, minor fractures, and a capillary refill between 4 and 7 seconds (sometimes longer in cold environments). Field dressing of the wounds is usually applied quickly. Fractures are stabilized and individuals listed as green will be asked to assist with collection of yellow individuals for transport to the medical staging area. : Red requires immediate medical attention and will not survive if not seen soon. A person with a severe head injury, multiple fractures to the skeletal system, fractures in delicate areas such as the spinal cord, massive confusion, incohesive, unable to answer simple questions, unresponsive but with vital signs, arterial bleeding, internal bleeding, or capillary refill exceeding 7 seconds is classified red. Immediate aid is applied