The Blue Cut Fire started on August 16, 2016 at 10:36 AM on Old Cajon Blvd. in the Cajon Pass north of Kenwood Ave. and west of Interstate 15. The fire quickly spotted across Cajon Creek and grew into a large wildland fire.
Extreme fire behavior with rapid rates of spread were occurring throughout the first and second days created by dry fuel conditions, high temperatures, low RH, and moderate winds. During the course of the fire, railroad lines, local roads, highway 138 and Interstate 15 were closed for several days.