A fire at an encampment between the Northbound 101 Freeway and the Cabrillo exit caused the temporary closure of the exit in Santa Barbara on Tuesday night. A plume of thick black smoke could be seen near the freeway around 6 p.m. Santa Barbara Police detained a man as firefighters put the fire out. Investigators found a small propane tank, a backpack and evidence of an encampment. No one was hurt, but there is a lot of burned debris to pick up.