It appears to be a fluid situation (no pun intended) and they are still considering the options, including having them do what would be a difficult dive, after a crash course.
The flip side of that is trying to wait out the rainy season, but they'll be fighting the possibility of more water that could overwhelm the capacity to pump, and perhaps even jeopardize the safe spot.
I've always found caves fascinating, and even considered trying spelunking, but then decide to tempt fate with other activities that don't involve the possibility of suffocation or drowning.