One of my sons was a lifeguard when RAGBRAI came through town and had to be at the pool at 6:00 am, as that was a place bikers could shower. We kind of wondered if anyone would be there that early, but there were several waiting for him. I guess starting out before sunrise is not a bad plan if it is going to be scorching hot.
He worked 6:00 am to midnight that day. Disinfecting the showers was a revolting job. When he was on the guard stand, he thought it would be impossible to see anyone on the bottom.