The Loop Fire started after 5:00 am on November 1, 1966, from a faulty electrical line at the U.S. Army’s Los Pinetos Nike Missile Site in the Angeles National Forest. The fire rapidly spread from the mountain top to the urban areas, being pushed by the 60 mile an hour Santa Ana winds. While operating at the wildfire, the El Cariso Hotshots were trapped by flames as they worked in the Pacoima Canyon, the Santa Ana winds changed direction, trapping them in a sudden blow-up of fire. Ten members of the crew perished in the Loop Fire that day. Another two members succumbed from burn injuries in the following days. Most of the nineteen members who survived were critically burned and remained hospitalized for some time. As a result of this fire, the Downhill Indirect Checklist was created, to improve firefighting equipment and fire behavior training.