How screwed is car after engulfed in floods?

2001 Maxima. Low mileage and dependable considering. Only vehicle that family has and forced to share. Long story where city caused completely messed up dangerous situation in neighborhood that had known flooding issues & they exaberated it all immensely causing f'd up dangerous situation with us next to main drainage ditch being completely f'd by.
Waters rose quickly while heavy rainfall continued. Waters were bringing to reach past car so husband frantically hoped in cracking hitting gas in hopes to fight the forces but was swept back into violent waters in the streets inspite of. He says he never took foot off gas & uncranked while car was still in motion and believes uncranked by time exhaust surmerged under completely into water but idk if even possible happened so quickly.
We frantically tried to get out with adrenaline pumping as if we were trying to rescue our child (because of its importance) & neighbor brought out tow strap trying to help but unable to use vehicle in conditions & 3 adults unable to make it budge from the violent forces of water we gave up.
At the height of the waters the engine was completely submerge and maybe covered for an hour of the waters reaching the top of hood (but not covering hood completely) and sat in waters for 4 hours where water lines hit right at bottom of windows and probably 3 hours of calmer waters before cleared out.
Massive contronstruion site overflow nextdoor also caused more sediments in water.
We hadn't attempted cranking it and raised hood to help dry all. Has been a week now as I was injured from & unable to do myself. And though plumber he's kinda an idiot about cars where im the one who has a engineer mind & after troubleshooting & researching able to fix anything.

Sorry long winded story.
His screwed our we? Only have liability insurance on & apparently will take years to sue city if even able to with the government grossly overprotected to prevent lawsuits. But yeahhhh... Ugh.
TIA

---

Originally posted on r/DIYAutoRepair — View discussion