Hour 0 at detection by an automated system: 10 acres
Hour 1: 200 acres
Hour 4: 1260 acres
The first few hours were in the wildlands which are difficult to access, don't have fire hydrants every 500 feet, and aircraft were grounded due to 60 to 100mph winds
No, the fire hydrants did not run out of water because the Santa Ynez reservoir is down for repair. They ran out of water because the system depressurized.
The fundamental issue is extremely dry vegetation and extreme wind. The dry fuel is caused by increasingly violent oscillations between extreme wet seasons (causes lots of growth) and extreme dry seasons (causes dryness).
This is exactly the "hydroclimate whiplash" predicted by climate models: https://newsroom.ucla.edu/releases/california-extreme-climat...
Yes, it is gross negligence, but at a much more massive scale than you're suggesting.