Boys from the soccer team trapped inside Tham Luang cave covered in hypothermia blankets react to the camera in Chiang Rai, Thailand, in this still image taken from a July 3, 2018 video by Thai Navy Seal.
When looking at an animation of the cave rescue, Brick said, "The ceiling dips down enough in certain areas that it forms a waterproof seal when those passages fill up". On Monday, four more were rushed to a hospital.
Now four boys have been safely freed from the cave, while eight more and their soccer coach remain trapped after 16 days of isolation.
But with oxygen levels inside dropping to risky lows and the prospect of heavy rains flooding the area completely, authorities decided they had to move quickly, and take the group out through the water-filled tunnels.
A helicopter flew the four boys to the nearby city of Chiang Rai, where they were taken by ambulance to hospital.
When a pair of expert cave divers from the United Kingdom discovered the 12 players and their coach huddled together on a dry slab of rock, there was joy and elation, but also unease as it became clear just how hard it would be to bring them all out.
It could take two to four days complete the mission, officials said.
The death Friday of a former Thai navy SEAL underscored the risks.
Chiang Rai acting Gov. Narongsak Osottanakorn said Saturday that mild weather and falling water levels in recent days had created the "perfect" conditions for an underwater evacuation. He said those conditions will not last if the rain resumes. Narongsak said experts told him the new rain could shrink the unflooded space where the boys are sheltering to 108 square feet.
Since it is rainy season, you can expect nearly everyday you will get some type of rain.
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Among these were that none of the boys had scuba diving experience, and that they could easily panic while swimming underwater in darkness. But then oxygen started running low in the cave, and officials also anxious the little piece of real estate the boys and their coach have could be lost.
Each rescue operation takes around 10 hours. "The boys' strength, the plan - today we are ready like before". Multiple calls to senior government officials and military personnel leading the rescue operation rang unanswered Monday evening.
The operation began at around 11 a.m. local time on Monday and is expected to finish for the day around 9 p.m, reported the BBC. It takes several hours.
Governor of Chiang Rai province, Narongsak Osatanakorn, said: "Today is D-Day".
Earlier on Monday, divers placed new oxygen tanks along the way out of the underground network as part of preparations to repeat yesterday's mission.
About 90 divers - 50 foreign and 40 Thai - are involved in the operation to remove the boys from the cave, he said.
He also tweeted that SpaceX and Boring Co. engineers were headed to Thailand to see whether they could assist Thai authorities.
Authorities had been rushing to extract the boys and their coach from the cave as monsoon rains bore down overnight on Sunday.
Four boys and the coach are still trapped.
"There's a likelihood of resilience, assuming everyone comes out, there's no fatalities, I think the worst is behind them", Adesman said. This would involve a psychologist, and likely other mental health professionals, working with the teens to revisit some of the trauma, talking about it through various stages of therapy and becoming more capable of coping with the emotional trauma of what occurred.