The only other option is to wait until the waters subside. There is no sign that the efforts have lowered water levels to a point that would allow an extraction on foot.
While the biggest immediate risk is more flooding, there are also risks associated with waiting for the floodwaters to recede, which could take months.
"We are hungry", the boys told the divers.
Police have refused to answer questions on whether the 25-year-old coach should be charged for leading the children into the cave, the Khaosod English paper reports.
Drilling into the chamber and airlifting the group out is another option, but this sort of extraction is thought to be a unsafe one.
The Thai Navy SEALs posted a video on their Facebook page showing the moment when divers found the group huddled on an embankment deep inside the cave.
"How many of you are there - 13?"
An Australian miner who was trapped a kilometre underground for a fortnight said the 12 Thai boys and their coach now had "hope" after their miraculous discovery inside a cave. 10 days. You're very strong.
The boys and their coach were trapped in the cave for 10 days before rescuers reached them.
Night's sister said her brother and the three boys from the same village would gather at their house almost every day before going out to play. At some points, passages are so narrow that a person can not fit through while wearing an oxygen tank. Thai authorities called on them to help. "It's an Israeli technology that we're very proud of, that we are able to help them".
He said the team is now recuperating.
Volanthen, a computer engineer, told the Sunday Times in 2013 that the secret to cave diving was keeping a cool head. She said she would cook her son a Thai omelet, his favourite food, when he returns home. "The last thing you want is any adrenaline whatsoever".
"Few cave divers in the world have the skills and equipment to follow this man, and the nearest were Richard and John", the society's account said.
Anupong said the boys would be brought out via the same complicated route through which their rescuers entered, and he conceded that if something went awry, it could be disastrous.
Options for extracting the soccer team include drilling from the surface to create another exit.
The boys knew the site well and had visited many times before, officials said last week.
With a country engrossed in the rescue mission, authorities insist they will only move the boys once their safety can be guaranteed, even though monsoon rains are predicted to soon resume. Gary Mitchell, the group's assistant vice chairman, said getting out of the cave requires about a half a mile of diving total, though not all in one stretch, and takes about three hours.
Chiang Rai Governor Narongsak Osottanakorn said the authorities were keen to get the boys out and suggested it might have to happen in phases, but only when safe.
Benjamin Brown is a reporter for Fox News. They have been given much-needed food and medical supplies - including high-calorie gels and paracetamol.
The twelve boys and their coach had walked down a tunnel in the Tham Luang cave network to write their names on the wall, and were planning to leave straight away, said Ben Reymenants, a Belgian diver on the scene.