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## How the Trap Closed
What happened between the team’s entry at approximately 4 p.m. on June 23 and the discovery by parents and police later that evening is documented in accounts from the families and from the rescue teams.
The team had moved deeper into the cave than a casual visit might suggest — reaching Nern Nom Sao, the high chamber approximately four kilometers from the entrance. This was their intended destination: a chamber they apparently knew as a goal point for the trip, elevated enough to offer a dry resting place. They had made it there, and they were on their way back when the flooding caught them.
The monsoon rains that fell that afternoon were heavier than average — accounts describe a rainfall event that sent water into the cave through every available channel with unusual speed. The passage near Sam Yaek, the junction approximately one kilometer from the entrance, flooded first, creating a sump that blocked the team’s exit. The water rose quickly enough that attempting to pass through the now-flooded section would have been immediately dangerous.
The team moved back to higher ground. The rational choice in a rising-water situation in a cave is to move up: water fills from the bottom, and high points remain dry longer. The only high ground available to them, with the exit passage blocked and the water rising behind them, was the mud shelf at Nern Nom Sao where they had been minutes before.
By the time family members began calling authorities late on June 23, the team was already in the position they would occupy for the next nine days. They had food for a brief outing, not for an extended stay. They had the clothing they had worn to football practice. They had each other and the darkness.