This is a terrible tragedy for this family and our hearts and prayers are with them in this difficult time. The greatest gift this little girl has given is understanding the need to be vigilant across all venues.
1) Be near your kids. You need to know what they are doing- are they getting knocked around by the waves, have they been in the water too long, when was the last time they had something to eat, something to drink, when was the last time they got out of the sun? It is not for me to say- how old kids can be before mom and dad stop trailing after them, but if they are going to be free to roam the park then mom and dad should at least have schedueled meeting places every 1-2 hours to check in on what is happening.
2) Teach your children to ask for help. Everyone is big into fear of strangers that kids are often afraid to talk to someone they don't know. Helping kids understand that people are there to help you may make the difference between life and death. WHile I am NOT faulting the Disney staff in any way- they are not paramedics- just CPR trained lifeguards. Several rules: 1) she had to have looked "sick"- her color must have been poor. She is a child and the lifeguards should have insisted she lie still until her family could be located. The fastest way to induce shock is to have someone stand up. 2) check for alertness and orientation- it is hard to imagine that she had a head injury as most head injuries the person is difficult to rouse, vomiting, ataxic, and disoriented. But of course- an epidural bleed is certainly within reason. 3) a quick history- did you fall, when did you last eat, when did you last drink. A statement such as you don't look like you feel well- lie still until we get your parents and take a look. Most kids won't "buck" authoritative statements. They will however shrug off questions if they are afraid, or scared-- and she probably felt very scared of how she was feeling.
3) Sun and Fun- too much can be a bad thing. Even though you are in water- you still need to take good care of yourself. You need to take breaks from the chlorine/ or salt water. You need to get out of the sun and into shade periodically, You need to take a rest- swimming or tugging those rafts is exercise. You need to hydrate- water is always good, but if you are doing alot of swimming and tugging rafts- you may be sweating but not know it because of the water on your body- in this case a sports drink is a better substitute. Know your limits- young children and the elderly are affected the most by the heat first. Protect yourself with reapplications of sunscreen. Listen to your body: fatigue, muscle cramps, dizziness, shortness of breath, feeling warm or cold,chills, nausea, vomiting, diarrhea- are SIGNS to STOP and get help. Heat exhaustion and Heat stroke are serious, serious problems.
Don't expect kids to know their limits. For the most part they don't. They don't have the sense of mortality that adults have. Parents need to be proactive in knowing what their children (even those in college-look at the honors student who left a party with strangers in Aruba) are doing. Safety first for all.
just thoughts