The Delta Fire had little spread Tuesday, and containment has improved 15%. The nearly 54,000 acre delta fire grew just over 500 acres in the last 24 hours. The Delta Fire has merged with the Hirz Fire, which is being called 97% contained after burning 46,150 acres. Both were human caused, though specifics concerning the causes are still under investigation by the Forest Service. The Delta Fire started last Wednesday afternoon 2 miles north of Lakehead, while the Hirz has been burning since August 9th when it started off Gilman Road. Crews have been making progress on containment near Boulder Creek in the northeast and Fenders Ferry Road in the southeast. Lines are holding in the Dog Creek area. An inversion layer lifted Tuesday and some of the smoke cleared, allowing more aircraft to make drops on the western flank, including super-scoopers dipping into Trinity Lake. Firefighters are continuing an aggressive attack in the north and northeast near Shotgun and Hazel Creek Roads. Evacuations are still in effect from Vollmers to Gibson, and in Trinity County for East Fork Road to Ramshorn Road east to the Shasta County line. In Siskiyou County an evacuation warning has been issued for Dunsmuir. Shasta County does not issue pre-evacuation warnings as a matter of sheriff’s office policy.