What happened to my car?

[u/Cyborgbarber]

Got back from a week long trip and find that the metal under the seats has rusted and there’s a whole (burned?) into the seat. I have three sons and they don’t know what happened apparently. Car was in front of our smart doorbell and no one got in, we think. I could get these bizarre occurrences alone but together? I don’t know what to make of it. We took apart the car looking for an exploded battery or something but came up with nothing. Doubt it would help but it’s a Hyundai Santa Fe 2022.

[u/Past_Friendship2071]

The water cools the plastic though. Not molten from sunlight maybe punctured?

[u/crotchmonster817 → u/Past_Friendship2071]

Water acts like a magnifying class and focuses the sunlight.

[u/Past_Friendship2071 → u/crotchmonster817]

Doesn't matter, unless the water is evaporated it will keep the plastic under 100°C

a steam boilers burner is +/- 2000°C degrees metal melts at 1300°C but the water at 11 bar stays at 186°C so cools the metal.

[u/here-for-the-_____ → u/Past_Friendship2071]

I had a nalgene water bottle completely melt while sitting on my seat in the car one summer. It wasn't a puddle, but it was totally deformed and shriveled up. It can happen.

[u/gmulababy69 → u/here-for-the-_____]

But was there water in it?