So, judging by my totally unscientific research, it appears that the vehicle drove into the ditch, and didn't just "get flooded" on Ambassador Caffery.
Stafford Barnett, who you may know from KPEL's Winging-It Wednesday, and whose home flooded last August, has come up with a way to protect his home by using a unique device that he built. He was kind enough to share pictures, and instructions on how to build one for yourself.