Why was 117-million-gallon reservoir not used during Palisades firefight?

During the intense firefight in the Pacific Palisades, a massive reservoir with the capacity of holding 117 million gallons of water stood idle, unused and bone dry. MORE: https://abc7.com/live-updates/socal-braces-possibly-destructive-windstorm-amid-dangerous-fire-weather/15771235/entry/15788618/