We were on this cruise and heard of the medical emergencies. My husband and I ran the 5k in the morning and once we were done I went back to the cabin to shower and change. There was a cryptic announcement on board directed to crew members - something like "bright star (or star bright - I forget which) gangway 1." I knew something was wrong because we have a similar type of coded message when someone has a medical episode at the company where I work. This would have been sometime between 10:30 and 10:45 am. I did not really give it much thought until we were back on board later and some of the crew members made reference to a "most unfortunate" and "worst situation" medical emergency. This was around 5:30 and as the PP wrote, shortly after that the captain made an announcement that we had not departed Castaway Cay yet because they were attending to a medical emergency.
So very sad for everyone involved. I understand the adult passed away, but I hope the youngster is ok.