Ok, here's my input, and y'all can take it with as big of a grain of salt as needed.
Canned goods in the heat.. If it exploded, its not from the heat.
Canned goods are treated at high temperature to ensure that the contents are sterile
similar to MREs. The only reason that they are going to actually go bad is that the canning process failed or that the can was somehow breached. Exploding cans are a direct indication of improper canning that led to a bacterial growth in the can that caused it to swell and explode (botulism anyone??).
From my experience at Burning Man for several years, storing canned goods in the trunk is the best place for them. Despite 120F in the shade during some days, the trunk was still relatively cool in comparison. This was the defacto storage spot for items that could not take the real heat that all the humans were suffering through.
MREs are the same way. Storage at higher temps will not actually spoil them (remember the food in the packages is STERILE), however it will seriously degrade the quality of what you dig out of the bag/pouch. I have eaten many MREs that are well beyond their date, they still made a turd and did not kill me in the process. Same goes for canned goods, I have opened and consumed items that were five years beyond their "date" regardless of storage protocol, and I'm still here.
Unless the can is damaged or swollen, it is most likely safe. Use the smell test and common sense first, it will tell you what's really going on..
No implied warranty, your mileage may vary, batteries not included, some assembly required, etc... Take charge of your own destiny, its not my responsibility
Be careful, but question everything...