I have to believe the timing had something to do with it. Even with timely warnings, which there were warnings, 3am 4am are the times when most people are asleep.Harrison Bergeron said:
Easy to second guess - someone noted a reasonable, low cost, easy solution: everyone have an NOAA radio. Overcomes that cell tower problem and provides real-time data and warning.
Even with a warning and even if they heard the warning, it is dark, kids are asleep, it would be chaos trying to evacuate at that time with those circumstances.
Did they have a NOAA weather radio in the Camp.
I have one that gives of a siren in warning situations, but even with that, the darkness, the time of the morning, the chaos to get the kids moving, possibly even exposing them to more danger, there is no system to prepare for a river rising 26 ft in less than an hour.
Much like there is no way to be ready for an F/EF 5 tornado.