We’d advise a number of measures for security and safety:As landlord, make regular inspections yourself, or get a property manager to do this on your behalf if you are some distance awayIf you haven’t done so already, install motion-operated lights and alarmsMaintain any fire protection systemsMake sure heating is off or low, pipes are not frozen up in the winter, and all electrical appliances are unplugged or switched offSecure all access points