A British man, five other Western tourists and two Thai guides were swept away by the floods while exploring the cave in a southern Thai national park.
The British tourist, Helena Carroll, told Thai television station TITV that she was shouting: "'Help me! Help me!' all night. Then I saw a light."
Carroll was shown leaving the national park in tears by boat with her rescuers, who she said were "good men."
The other victims are four Swiss citizens and a 10-year-old German boy, police Lt Col.Pichan Kanayasiri said.
The group had been trekking through the Khao Sok national park in Surathani province late Saturday afternoon when a heavy rainfall sent water surging through the cave, which is near a waterfall.
"The tourists were inside the cave and didn't know what was happening outside," Pichan said. "They were trapped inside the cave."
The province's governor, Winai Phopradit, said he had ordered the national park to close during the current rainy season.
"We have signs both in English and Thai warning tourists not to go into the cave during heavy rains," he said.
Several years ago a Belgian tourist died at the same location.
Source: The Sun