An insulated fermentation box is always a good idea. I'd spend $10 on a digital min/max thermometer and see what the variations are.
It is impossible to form an explosive mixture from fermentation. Exploding bottles are a different sort of thing.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk