Have contingency plans. Many years ago I was involved in the response to a collapsed dam flooding our valley. Almost immediately farmers and ranchers out of the area of danger volunteered to take animals from those threatened by the flood. I would think a car dealership might consider finding a place or places where cars can be stashed until it calms down. For example, I could shelter a few cars on my driveway and street. I just think people with a lot to lose should think of possible ways to protect themselves rather than remain absolutely naked to the violence and malevolence. I realize there are insurance issues and so forth but I think people should start thinking the unthinkable before it catches up to them.
I've got room for a 2020 Corvette and GT500; they'll get the best spots, maybe even the garage.
Good point.