They are suppose to have a red flag flying, but some might not know what it means.
Yes, they are supposed to have a red flag, if they had lifeguards. I think our lifeguards blow their whistles if someone goes beyond the edge. Jellyfish and moderate surf usually get a yellow caution flag. Rip tide conditions are usually a red no swimming flag. People need to realize that swimming in a tidal body of water is much different than a pool or lake. Just because it looks okay doesn't mean it is.