While you're no doubt going to be concerned about the medical attention someone will receive at a nursing home, you should also do your best to find out what the facility's plan is for keeping your loved one safe and secure. Do they have their own hospital transport? If not, what is the average time for an ambulance to reach them?
You'll want to investigate the building's fire safety systems. Are there sprinklers? Fire alarms? Adequate escape routes from all floors? Has the staff been trained in proper evacuation techniques? If the nursing home resident you care about is dependent on a medical machine, you'll also want to ask about back-up power generation.
Lastly, ask the nursing home what precautions they take to protect residents' belongings. Are there safe deposit boxes? Do residents have something they can lock in their rooms? Is there a security guard to prevent unauthorized entry into the building? There are plenty of concerns to occupy your mind when moving a loved one to a nursing home -- safety shouldn't be one of them.