The environment is wet, so they must be kept warm and dry, and be provided with clean drinking water, food, and clean air.
The boys are between the ages of 11 and 16 and had set out to explore the Tham Luang caves with only minimal food and lighting.
Interior Minister Anupong Paojinda said in Bangkok on Tuesday that the 13 footballers would be brought out of the cave in Chiang Rai's Mae Sai district through the passage to its main entrance. It was, and hours later Chiang Rai provincial Gov. Narongsak Osatanakorn confirmed that all of the 13 missing individuals had been found alive. "I'm not sure they can eat as they have not eaten for a while".
The condition of the group was not immediately clear after days underground.
In the video, posted on the Thai Navy SEAL Facebook page, one of the boys asks the rescuers to "go outside".
The boys are seen by torchlight sitting on a ledge above water, responding to the divers that all 13 were there and that they were very hungry.
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Anmar Mirza, the US National Cave Rescue Commission co-ordinator, said the primary decision is one of whether to try to evacuate them or to supply them in place.
"We are coming, it's OK, many people are coming. we are the first", the diver says.
In footage that emerged after the boys were found by two British divers late Monday one asks to "go outside".
The boys appeared to be in good health and were talking, asking what day it was and being told by rescuers that more help was on the way.
Outside the cave, overjoyed relatives who had clustered near the site in an increasingly desperate vigil hugged and smiled as news of the miracle rescue filtered back.
"I found out from the television".
"I'm so happy I can't put it into words", another relative of one of one of the group told reporters as tears of joy streamed down his cheeks.
"Worst case scenario is they have to dive them out", said Pat Moret, a rescue consultant told CNN on Monday. The divers are aiming for a sandy chamber on higher ground in the cave, where they believe the group would be safe.
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Worrying predictions of heavy rains later this week mean rescuers must scramble to shuttle help and supplies to the stranded kids.
Scores of divers - including foreign experts - were sent into the cave with hundreds of oxygen tanks, establishing a base camp inside the chambers over the weekend. Personnels, right, of U.S. Special Operations Command Pacific Search and Rescue team meet with rescue teams from China, Thail.
Thailand has been a nation transfixed by the plight of the Wild Boar team, with social media lighting up in support of the group and the country's deeply spiritual reflexes stirred into action.
Shamans and Buddhist monks held prayers and gave offerings at the cave imploring mountain "spirits" to return the boys safely. They were apparently trapped inside by flooding caused by heavy rain and have not been heard from since.
The natural chimney, around 1.5 meters in diameter and at least 22 meters (72 feet) deep, was found to the north of the opening of the cave, where the boys' bikes were found last Saturday.
Tham Luang cave is one of Thailand's longest, winding 10 kilometers (6 miles) and is also one of the toughest to navigate - especially in the wet months.
Surawan's reference to four months has been interpreted as a potential sign that authorities are considering waiting until after the rainy season ends in October to begin the rescue operation.
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