An "atmospheric river" has been fueling the storm.
City of Santa Barbara passes arguably strictest regulation for ban aiming to reduce waste.
In minutes the rain storm sent boulders tumbling down slopes towards residential areas.
"We can throw everything we have at it."
An evacuation order was issued Sunday as the blaze continued to move west.
Authorities estimate 105,000 gallons of oil have spilled.
The oil spill is the largest to hit the local coastline in nearly two decades.
A gunman killed two women and four men, aged 19 to 22, and wounded 13 people, including eight who he shot as he sped through town in his black BMW