Battalion IV is located in the southern portion of the Tehama Glenn Unit. The Battalion IV boundary begins at Gyle Road in Tehama County and extends to the Glenn Colusa County line to the South. Battalion IV boarders the Sacramento River to the East and the Mendocino National Forest to the West. Communities protected by CAL FIRE/Tehama County Fire; Corning, Richfield, Rancho Tehama, West Vina, South El Camino, Henleyville, Flournoy, Paskenta Newville, Chrome, Grindstone Rancheria, and Elk Creek. Battalion 4 fuel type is primarily grass/ oak woodland in the valley and brush and timber to the west. The valley floor has a large area of cattle rangeland and orchard agriculture including olives, almonds, and walnuts.

Battalion IV is comprised of one staffed Tehama County Fire Station located in Corning and two CAL FIRE Stations located in Paskenta and Elk Creek. The Tehama County Fire volunteer companies are Richfield Station 11, Corning Station 12, and Rancho Tehama Station 13. Battalion IV is committed to the protection of life, property, and natural resources through cost-effective planning, prevention, support, and emergency services.