Sorry to hear this. If it was to the top of the door... The entire electrical system has been submerged along with everything mechanical. Ductwork, dash, gauges and everything in the interior has been soaked with water and whatever else was mixed in it. (Sand, mud, SALT etc.) Flushing every system and cleaning or replacing everything interior will be a big job. Electrical connection corrosion will produce gremlins until they are all disassembled and cleaned. Especially if it was tidal surge salt water. I hope it was insured.