On November 1, 1966, the El Cariso Hotshots were trapped by flames as they worked on a steep hillside in Pacoima Canyon on the Angeles National Forest.
Ten members of the crew perished on 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.
Lessons learned from the Loop Fire resulted in the checklist for downhill line construction, improved firefighting equipment, better fire behavior training, and the implementation of new firefighter safety protocols.