A voip call should be done normally, which means that unless you are one of my starred contacts I don't get a notification in DND mode. I have starred maybe 5.
You can make up all sorts of notifications for emergencies but I could counter with what happens if I am in the shower when I get the notification? I don't want a tornado warning the last possible second, I want to know it ahead of time so that I can get to a safe place. If my car is broken into there is nothing I can do, if my grandmother has a fall it is at least 30 minutes before I can get to her, I don't need notifications for bank payments (it gets added to a list that I renew when necessary).
I wouldn't want a notification for an active shooter at all -- if I was hiding from the shooter, it could give my location away.
You can make up all sorts of notifications for emergencies but I could counter with what happens if I am in the shower when I get the notification? I don't want a tornado warning the last possible second, I want to know it ahead of time so that I can get to a safe place. If my car is broken into there is nothing I can do, if my grandmother has a fall it is at least 30 minutes before I can get to her, I don't need notifications for bank payments (it gets added to a list that I renew when necessary).
I wouldn't want a notification for an active shooter at all -- if I was hiding from the shooter, it could give my location away.