We live in New York. Bark is falling off several of our trees. Could it be Dutch elm disease? It’s falling off in slivers.
The bark looks like its on an ash tree, not an elm tree. Could this be correct? If it's an ash, then I suggest a bad (and fatal) infestation of emerald ash borer. I've seen this kind of bark loss all over the city in which I live - including on four of my own mature ash trees. It does look like you have borer exit holes in the last photo, particularly the sideways D here:
Please let me know if I'm off-base on the trees being ash trees, and I'll delete my answer.