[user104658]

I fear that this is going to end very badly. Oxygen inside the cave is running low, it takes expert divers 5 hours to navigate the caves alone and some of the kids can't even swim, digging down to them seems not to be feasible, pumping water as fast as they can is barely making a difference, and with every bit of rain there's a chance of the cavern they're in flooding.

As horrendous as it may sound, they need to focus on identifying which are strong swimmers and getting as many of them out fast as they can. The rest it's literally going to be down to fate / chance, and it's probably less of a risk to try to wait it out than swim. It's really horrible.