Breaking: Arnold Fire reported in Sonoma County on April 18

Published Apr 18, 2026 #Bull wacker run arnold fire

First discovered: 1:16 p.m. April 18

Initial location: Sonoma County, Calif.

Fire type: Wildfire

Fire name: Arnold

A new wildfire was reported today at 1:16 p.m. in in Sonoma County, California.

Arnold Fire has been burning on private land. There is currently no information on the containment of the fire and its cause has not yet been determined.

Source: National Interagency Fire Center