corrosion and then exacerbated by a lot of heat.
there you go.
https://www.wsoctv.com/news/trending/part-highway-collapses-philadelphia-after-tanker-truck-fire/2DMJJDSHVJAU3GCJZDLI4JJ2WA/
vehicle trapped under collapsed bridge!
this is news from this morning.
the newer story is that authorities say
no injuries BUT someone is trapped in a vehicle under the collapsed bridge (Unless I'm reading it wrong)