I’ve said it before, but tonight’s events bear repeating it again:
If your doors and windows are protected by burglar bars, have a key box or combination available to emergency responders.
Having a key holder who lives at a different address isn’t going to cut it. If they’re not at home, or don’t answer their phone for some reason, there is a very good chance you can die behind your little Wall of Safety while the good guys stand helplessly outside.
Get a lock box, and have the combination on file with your local ambulance service or 911 call center.