California America Water has urged residents in the area close to the Mountain Fire to restrict their water usage.
"Limiting water usage during this important time helps firefighters by ensuring a readily available water supply for their fire suppression efforts."
The Mountain Fire has grown since Wednesday morning to over 8,800 acres and destroyed homes in southern Ventura County.
Fire-fighting efforts are being hampered by extremely high winds, and fixed wing aircraft have not been able to make retardant drops.
At 3:30pm, the fire was still 0% contained.
