Just ask the residents of Ft Myers how those EV's worked out when it came time to evacuate. Most of them got abandoned. Now they are returning home to find their abandoned EV's burning to the ground after getting drowned in water. NO THANK YOU!!
In an evacuation, an electric vehicle that is fully charged can actually have a bit of an advantage over a ice vehicle. The electric draw while sitting still or moving ahead sporadically can be accomplished in many instances more efficiently. But yes, vehicles that were left behind for whatever reason were adversely impacted by the exposure to salt water. That can impact the batteries and cause spontaneous combustion. But if they do catch fire at least they won't show up for for some unsuspecting person on a car lot like a flood damaged ice vehicle would.