I'm not sure i believe it either - there has to be something additional going on.Just showed missus and she didn't believe it. I had to explain the power of yeast and CO2
In my previous job we used shipping containers for storage and as site offices and I can tell you right now that ambient temps have nothing to do with the actual temp inside one. You get a clear day and they become an oven.In addition if it was a recent thing, the ambient outside temperature (especially at sea) would have been no more than 8-14C anyway and most yeast is not happy or that active at those temps.
BIAC
I know why it blew up,,,,,
No kittens in the airlock!