The Thai navy is preparing for both scenarios.
"How many are you?" So getting boys through there one by one, and the risk that they will panic is there. We are coming. OK?
After an initial exchange in which a rescuer ascertains that all 13 are present, one of the boys asks what day it is, and a rescuer replies: "Monday". After a break in the weather in recent days, the Thai Meteorological Department forecast for Chiang Rai calls for light rain through Friday followed by heavy rain starting Saturday and continuing through July 10. "We come, ok, we come".
"They are doing well at the moment".
They still have to be extracted from the caves, and are reportedly "too week to move".
Deputy Chiang Rai governor Passakorn Boonyalak replaced outgoing governor Narongsak Osotthanakorn in supervising the operation Tuesday. "They have got no visual reference", he said.
"I want to hug my son... usually our family sleep in the same bed together". "People have been watching it very closely, especially on Facebook and YouTube". He assured reporters that rescuers "won't bring them out until we find a totally safe way", the Bangkok Post reported. More food supplies have already been sent to the cave since rescue teams are not certain how long a safe exit could take.
Options like teaching the boys to dive, and swim with special breathing masks are being considered.
The briefing warns, however, that the danger has not abated. Right now, huge water pumps are working on draining water out of the cave, but any rainfall can hinder the efforts of the pumps and put the rescue in jeopardy.
All 13 are in a good condition after being assessed.
Several divers, including a doctor and a nurse, have since yesterday been with the group inside the cave. "We will work all night", he said. He said doctors had advised giving the medicine as a preventative measure.
"The description in his email was it was a bit of a gnarly dive, which means there were complications and problems", said Bill Whitehouse, the council's vice chairman.
If the risky rescue doesn't go ahead, the group may have to wait for three to four months before the waters recede. "They're going to have to have some kind of backup plan for that contingency". They've possibly been lying still for days now. "What is the best possible way to get, you know, these kids and the coach out?"
Mr Harper, from Somerset, began caving in 1968 and is said by Wessex Cave Club to have "extensive experience throughout Britain", and in Switzerland and France.
A limestone cave complex is like a giant sponge, said Amy Frappier, a professor of geosciences at Skidmore College who has done extensive research in caves.
Many had been posting cartoons of the rescue attempts, and by Tuesday the drawings had changed into pictures of gratitude.
ISome of the boys appeared to be wearing a change of clothing.
Thailand's Prime Minister Prayuth Chan-ocha said of the boys' discovery that "everybody is a hero".
"This incident has shown the unity of the Thai people..."
"We haven't eaten", a boy said in Thai, then in English: "We have to eat, eat, eat!"
As a flickering torch illuminated the pitch-black cave, the first voice heard by the rake-thin boys perched on a ledge in their football kit was that of intrepid Briton John Volanthen. The British Cave Rescue Council, which has members taking part in the operation, estimates the boys are around 2 kilometers (1.2 miles) into the cave and somewhere between 800 meters (half a mile) to 1 kilometer (0.6 mile) below the surface.