Properly home canned food can be much more stable. Also, if you home can food and include lots of extra liquid, that can go a long way to satisfy your daily water needs. Remember, having a 10 year supply of rice and beans is useless if you only have 10 cases of bottled water. Especially here in CA where the majority of people have no access to a natural water source.
If you have burned through your 10 cases of bottled water, you are likely to have more immediate problems than food: Rioting, unstoppable fires, etc... 10 years without water in Socal? I don't think that a few extra jars of "canned food" liquid is going to make that much of a difference over a 10-year period.