San Fransisco cannot exist without Hetch Hetchy and it’s delivery of water...minute by minute to the city. They basically have to shut down the city and limit it to maybe 100,000 residents.
if California splits in 6, would SF even be able to fill Hetchy?
for $630M, they could probably build a nice desalination plant instead
I believe you are incorrect. The Crystal Springs Lakes provide terminal storage for Hetch Hetchy water. They are immediately south of SF and hold a huge amount of water. I drove between them a couple of weeks ago, and they were nearly full.