Extreme heat will certainly cause canned food to go bad, there’s no doubt about that. If you look at the graph of how long the average canned food lasts… as the heat increases the shelf life plummets like an absolute rock down to weeks (or less) in extreme temperatures. I’ve had these canned waters in my care for about 3 or 4 years now in some very hot weather (many weeks in the summer of 100+ degrees, and inside a car no less) and haven’t had one split yet. Not many cold days though which is good because these cans certainly can pop if the water freezes and expands.

I think you might be thinking about cans of carbonated soda… I don’t believe that’s the case with canned water though. I’ve had these cans in my car for a few years now in some extreme heat and so far I’ve never had an issue.