Marin is probably an outlier (no Sierra snowmelt water) and the issue does seem quite dire there. I'm not sure most of the reservoirs were ever dug, they were j

Marin is probably an outlier (no Sierra snowmelt water) and the issue does seem quite dire there. I'm not sure most of the reservoirs were ever dug, they were just dammed. You'd have to move the water to dredge them at this point. Seems like further conservation is needed, I think Sonoma has imposed further restrictions as well. Desalination could meet the human demands but likely at extreme cost the small county couldn't really afford, it would need to be shared with the rest of the urban area but with continued (although diminishing) cheap water from rivers/mountains that seems unlikely.