Re: California has about one year of water left.
Some data may help:
This is what happens when you encourage efficiency by subsidizing the replacement of inefficient appliances, improve insulation, change to multiple pane windows etc. After 2000 the graph is still flat for California. Just another example of that nasty nanny state.
So where does this electricity come from? The numbers below are in GWh (Gigawatt hours), enough to light a 100 watt lamp for 1,140 years, and for 2013.
Large Hydroelectric 20,754
Small hydroelectric 3,343
Nuclear 17,860
In-State Coal 1,018
Oil 38
Natural Gas (includes some biogas) 120,896
Geothermal 12,485
Biomass 6,466
Wind 12,694
Solar 4,154
Other 14
Direct Coal Imports 11,824
Other Imports (includes some coal) 85,022
Total 296,569
The reason for the "includes some" is that sources didn't have to be reported in these cases. This is changing.
Note that hydro is important but not critical. On the other hand, much of the imports are hydro via the Pacific Intertie, i.e. from the Pacific Northwest.