So, it was bad.
For those that know the city - the Univ. Balt School of Law at corner of Mt. Royal and Charles - just before you get to the train station. Right as I crossed over Mt. Royal I realized the water was a LOT higher there than I had suspected. I've never seen high water there so me and the car next to me drove into what you are told not to drive into. It was up to hood level and I think I may have lost contact with the road briefly. I did re-grip, car engine never cut off, and got through it. But now my check engine light is on as is the traction warning light. Got home, parked it, crawled inside, and am getting an early drink. If, when it dries out, those lights stay on, anyone had experience with this and car insurance? Should I make a claim if it ends up being something got damaged due to the high water?