 They found the bikes, the bags, and some football shoes outside, and they raised the alarm. Deep in the caves, the wild boars found themselves in trouble. It had been raining for the last few days, and all that water falling on the mountain had to go somewhere. That somewhere was the Thaymuang cave system, which was fastly filling up. One initial account from the boys suggests they were caught off guard by a flash flood. They needed to get out, but instead had no choice but to scramble even deeper into the cave.