Is Neighbor Responsible For Fixing My Car If A Rotten Tree Of His Fell On It? 
That might be an issue that requires litigation . You can notify the neighbor that you are going to litigate . The neighbor can contact his homeowners insurance company and they can either litigate with you or offer you a settlement that you accept . It really isnt a matter of recriminations ; it is just a matter of settling who is at fault if anyone . Sometimes a court will accept such a scenario as an act of God . 