Look in to DAN - Diver's Alert Network. They offer an inexpensive medical evacuation policy that will cover your family
and pay for the best way to get to medical care. Does not
have to be a diving
related problem, you just have to be 50 miles from your "home" address. They will pay for ambulance, helicopter, medical jet, etc., whatever the best way to get the victim to emergency
care. They also have a medically staffed 24 hr phone
line (in the US) to deal with any emergency
requiring evacuation. Don't know if the policy is available outside the US, but it absolutely covers emergencies while travelling outside the US. https://www.diversalertnetwork.org/insurance/
In a lot of lesser developed countries emergency care is severely lacking. Some places it's best to adopt the motto, "When in pain, take a plane!"