Believe it or not, but if you manage to damage your engine by driving through deep water that snot under warrenty either, unless you own an ambitious vehicle. There is this incredibly odd and incridibly forced mentality in drivers of "Well I was on the road and I need to get from point A to point B, so nomatter the conditions I can't be faulted for driving through them". But if you drive through deep water and damage your car that's very much your own wrong doing and your own bill at the end of the day. And if it happens that there is no way from point A to point B that doesn't have the potential of damaging your car then you need to just not go at all.