We don't know how far into the cave they were when the flood hit. They may have gone through the dry tight section before the flood pulse hit and they were unab

We don't know how far into the cave they were when the flood hit. They may have gone through the dry tight section before the flood pulse hit and they were unable to return. The other possibility is that the various elevation diagrams published by the media may well be wrong. The only proper survey I have seen by cavers is the plan view (for example here: https://www.caverescue.org.uk/luang-nang-non-cave-rescue-thailand3/ https://www.caverescue.org.uk/luang-nang-non-cave-rescue-tha... ). It looks like the produced diagrams have been... "estimated" from reports of what the rescuers were experiencing. The cave may have filled up from the entrance first and chased the team up the cave.