Could the trees have been infected by Dutch Elm Disease? I've regrettably seen many old trees cut down from it, and you can't see much damage until it has progr

Could the trees have been infected by Dutch Elm Disease? I've regrettably seen many old trees cut down from it, and you can't see much damage until it has progressed significantly. Granted, I've never seen it affect an entire street full of trees at once, so that seems suspicious...