Being a native Ohioan (sorry bout that) and living in Va and Md my adult life have learned of the Storied squabbles between Va, Md, Pa and especially over water rights/ownership. For some reason some English King gave the colony of Md the entire Potomac River to Md right up to where the water licks the Va and now Wv shore. That still applies. No state line down the middle of the river. In years past neither Md or Va allowed gambling establishments however Md would allow gambling boats to come across the Potomac and put a gang plank down and envite Virginians aboard. Lots of squabbling about that. Even today there is an establishment at Colonial Beach Va where a board walk goes out into the river about 50 ft to a pretty large gambling facility. Right about half way down the board walk a big sign saying Entering State of Md.
As far as all this rain is concerned appears that the Susquehanna river was running about 10X the normal late July flow into the Chesapeake. With it a massive amount of debris out of Pa. This junk has gotten as far S as Annapolis and clogged the city docks. You couldnt get a dingy through it for a couple days. Again Md bitching at Pa for dumping all this stuff into the Susquehanna, rain or no rain.