 But they saw that the boys were alive and breathing, and one by one they were brought out of the darkness of the cave. They were given oxygen before they were swiftly spirited away to an ambulance in a hospital. Rescuers took them out in three batches over as many days as they needed time to replenish air tanks, but they were cutting it close. By the time the last batch of boys and the coach were out, water levels were starting to rise again as rapidly as 10 centimeters in one hour, according to a Navy SEAL.