It turns out if you drive at speed into a flooded road there can be consequences
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I'll say, and if it's only a hub cap, think yourself damn lucky.
After this video was posted on another thread (it shows an MG4 making it through a deep and nasty flood while a lot of ICE cars died) I spent a while looking at various flood videos including the infamous Rufford ford.
The universal take-home message is that those who drive at speed into a flood are out of their cotton-picking minds. Several cars in that video would have been fine if the driver had simply gone at a slow and steady pace. Instead they wrote off their car!
The difference with an EV is that it can't hydrolock so you are on a better wicket there, also the sealed battery prevents the car filling up with water from below so readily. But that itself can cause the car to float, as it did with that MG4 for a couple of seconds - he was lucky he drifted forwards to a place where his wheels got traction again. And who knows what damage he might have done to the car, even though it was still operational.
In the videos we saw cars losing all sorts of bits, from numberplates to front grilles to undertrays. (If your undertray has the MG4 warp, you could easily rip it off.) One Rufford ford video showed an array of detached numberplates lined up on the grass verge, including one from an EV.
If it's more than a foot deep, don't risk it unless you're taking a heart attack victim to hospital. If you do go in, drive slowly and steadily so that the bow-wave you create doesn't turn into a breaker.
