In the fall of 2010 I bought a case of sardines in tomato sauce. Stored that in my cellar. In August, TS Irene came and my cellar was flooded. It remained flooded for about 10 days. My canned food was under water that entire time, as well as wine bottles. When I was able to clean the cellar, all canned food seemed to have survived. Some cans rusted along the edges. The tomato sardine cans were a puzzle. They expanded. Looked like balls. I could not figure out why since they were well within the expiration date. Maybe it was the water temperature, or pressure? But now that you mention it, it could be the tomato acid which may have caused it.
Maybe tomato items should be removed from the metal cans and canned in glass jars.
Some wine bottles lost their labels. I had to taste test these to make sure they were still good. LOL. The bottles that were uncorked months later had mold between the cork and metal. One bottle tasted watery.
I have cases of tomato juice and salsa in glass for that reason.