My question involves real estate located in the State of: Ohio

My mother inherited a house after the death of my grandmother. My mother did not need this house and it needed alot of work which she could not afford to do. She decided to sell the house AS IS on a land contract. After a buyer was found the contract was made through a lawyer and both parties signed. Down payment was made and first payment was due 2 months later. This is where is goes BAD. Before the first payment was due the house caught fire. Buyer did not purchase insurance. The buyer left the house that day and has not contacted anyone or tried to make it right. Payment is now 60 days late. House is not liveable. What can be done?