Tree Law Question: Vines killing trees

Neighbor has a lot of trees that are being consumed by ivy. I know this will eventually kill the trees. Some of the trees would likely fall on our property, damaing fencing and a shed, possibly damaging the house.

Is ivy killing a tree considered something that the owner should know about and mitigate, similar to knowing that a tree is rotting? Would they be liable as it's a known "pre existing condition"?

I've talked with the neighbor and they are in no rush to get it removed. Just looking toward the future.