https://www.cnet.com/news/elon-musk-sends-aid-soccer-team-trapped-in-thailand-cave/

12 boys and their football team coach were visiting the Tham Luang cave system in Northern Thailand when they were stranded by floodwater for 10 days. More heavy rain is expected to flood the caves further, and sections of the passages out are too narrow to wear scuba tanks. Former navy diver Saman Gunan died after delivering oxygen to the children on Thursday, demonstrating how dangerous the escape from the caves would be. 

Employees of the SpaceX and Boring companies founded by Musk are on their way to Thailand to offer assistance. The Boring Company was set up to drill traffic tunnels, and could employ ground-penetrating radar or air pumps.