I look at the photo and don't think she looks "healthy".
Since she entered such a contest, clearly she wasn't mentally healthy! This contest is not sensible and was in very poor taste. I know that's par for the course in radio but come on!
"You assume she wasn't already low in electrolytes. Do we know her medical history, medications?"
Yes, I am assuming that, since I don't have any other information to go on. And yes, this kind of contest is irresponsible. I wonder if they did a physical on any of the contestants before they began? A simple chemistry panel would have been a good start, but I'm betting that all they did was get a waiver signed.