Firefighters from the Cosumnes Fire Department left Galt early Tuesday en route to Mariposa County to help fight the Carstens Fire.
They are part of a 22-member multi-agency strike team of engines from Sacramento County. An estimated 2,000 firefighters are already on scene.
The fire started on Sunday and by this morning had already grown to an estimated 1,600 acres and was only 15 percent contained.
Cosumnes Fire serves Galt.