Hello, In the past few days, my ash tree has begun to show more than half of its canopy curling, turning brown, and dropping (in varying degrees from green to brown). About 70% of the leaves have dropped, and of the leaves that remain, half have curled and are in various stages of turning from green to brown. In investigating the problem, I see that our cable utility company cut one of the tree's roots when they came out to bury a line last week (they had covered it back up with dirt and did not inform). The cut point on the root is roughly 15' from the tree. The trunk is 6' in circumference and the root was just under 3" at the cut point. This is a mature tree that is no less than 40+ years old. I have inspected the bark and there is no cracking, no sign of EAB, fungus, or other issues.  Aside from minor tears, the green leaves that have fallen appear healthy without any brown spots or holes. Can you confirm that this would be the cause and if so, is there a chance for recovery? If you don’t think this is the problem, what might be the culprit? What steps should I take?