Wow! Is that the metal actually cracking on that car? I thought it was cracks in the paint at first, but from what you are saying it sounds like it was in the metal?
I have not had anything ever survive well while in storage, regardless of where I lived. I live in California, too, and stored some stuff for a couple of years in a storage unit - including some old treasured books I got from my Mom that she had when she was a child (some original Lone Ranger books, an original Call of the Wild by Jack London and an original Bambi from 1928. The books suffered some damage from being in storage. Fortunately, it was none of the books mentioned above, it was mostly a few books that were nearest the floor, but I will never put them in storage again. I don't think anything survives well when it is stacked on top of itself several times over and left that way for any length of time. Just mho, but based somewhat on my own personal experience, for what it is worth.
I have not had anything ever survive well while in storage, regardless of where I lived. I live in California, too, and stored some stuff for a couple of years in a storage unit - including some old treasured books I got from my Mom that she had when she was a child (some original Lone Ranger books, an original Call of the Wild by Jack London and an original Bambi from 1928. The books suffered some damage from being in storage. Fortunately, it was none of the books mentioned above, it was mostly a few books that were nearest the floor, but I will never put them in storage again. I don't think anything survives well when it is stacked on top of itself several times over and left that way for any length of time. Just mho, but based somewhat on my own personal experience, for what it is worth.