1.) Drivers with flood-damaged vehicles should NOT start their cars without a professional inspection. Once floodwaters rise above a vehicles door openings, extensive disassembly may be required for cleaning. #stlouisflooding #stlwx 2.) When dealing with a vehicle that has been in a flood, the first step should be to contact your insurance company for help in determining the best course of action. Generally, flood damage is covered under auto policies with comprehensive coverage.