ICE stands for ’In case of emergency’ and found it notoriety in the mid-2000s. ICE is a fairly well known program to emergency workers when various emergencies strike and family members must be contacted. It’s simple and works fairly well with the widespread use of the modern cellular phone.
You simply make a new phone contact entry under the contact name of ’ICE’ and then enter into that the number(s) of persons you might want contacted on your behalf if you’re unable to speak for yourself. It is common practice today for emergency workers to look for cell phones in the course of their pre-hospital treatment. You can learn more by using your search engines and looking up "ICE cell phones".