Any facility licensed by the department of health or the department of social and health services, and inspected by the office of the state fire marshal, shall report within twenty-four hours to the office of the state fire marshal any accidental or unintentional fire, any deliberately set improper fire, any unusual incident that required implementation of the facility disaster plan, including any evacuation of all or part of the resident population to another area within the facility or to another address, and any circumstance which threatened or could have threatened the ability of the facility to ensure continuation of normal services to the residents.