At least one guy swam to shore on his own, so technically didn’t need to be rescued.
The reports that the MCFD was getting from observers, according to their incident report, was that MOST of the victims had swum back to shore safely. In fact, they were trying to figure out whether anybody was still left in the water. According to the incident report.
There’s a LOT more to be said about what was in that water. But that’s another story.