It looks like that to me as well, otherwise no one would have evacuated before the flood.
These people know that they are in a flood area. The vigilant ones were paying attention. The girls camp has been portrayed as upscale. They could afford more weather equipment since they were in the flood area. I’m not seeing why this should be a public expense.
BTW - I live in an area that has occasional tornadoes. There is no public warning system other than the standard weather alerts. It’s up to us to pay attention and that’s how it should be.