The Weather Channel just showed some videos of the "saltwater effect". They're now saying that even if you drive through salt water and let it dry, that might be enough to ruin the car. One of the videos showed a car (Tesla) parked in a garage that had salt water in it. The water was below the level of the car bottom, but it still ignited. They didn't know if the water level had been higher or just the salt air/vapors got into the battery compartment. Seems like they should have known that and made the battery compartment watertight.