With six lifeguards, another lifeguard could cover while the first lifeguard saved the drowning person. Imagine the news headlines and the astute CNN reporters who would have crucified the lifeguard for letting the person drown. The company that fired the lifeguards is no better than the pimps and prostitutes at MSNBC, CNN, ABC, CBS, etc.
I don't know (and the article doesn't say) how many lifeguards are at a given station. I assume they're distributed along some length of shoreline, one lifeguard to a station. But that's an assumption.