The holiday thing is a big issue. Your stomach turning knots when the phone rings and you recognise the number and you are waiting to board your flight. I used to think of scenarios as to when we would come back home i.e heart attack (unlikely) fall and breaks something (likely), going into hospital for a UTI and talking gibbish.
In the end although we were away quite a lot nothing urgent happened. I did get phone calls from parent or SS but very lucklily I could deal with it via a phone call.
Mum suffered a lot from UTI's and became almost incorrent and couldnt gain her balance. That happened a number of times, medication sorted it but everytime she was discharged she lost more and more confidence and became more and more frail. In the end she stopped eating. Her EOL medication was sorted although the surgery told me she wasnt there yet.
I wasnt there in the end. I asked her the day before when I saw her if she was in pain and she said no. Her EOL medication had started I presume.
Going back to the orginal question though. I had siblings abroad. I demanded that they be on standby. They wriggled a bit and the care home didnt want to call internationally but I told sibling to call the care home EVERY DAY. I dont think she did and eventually they got some sort of WhatApp in place.
It is funny that the people sitting 100's of miles away seem to have what they consider to be the best ideas as to what YOU need to do without actually doing anything themselves bar opening their gobs!