Dramatic footage captured the moment two tourists were washed away by a flash flood before a brave onlooker leaps into the water to save them.<br /><br />The two men were 'tubing' at a country park in Nakhon Nayok, Thailand, yesterday (August 13) when the heavens opened. <br /><br />A sudden deluge of water swept them away downstream before they desperately clung to a low hanging branch. <br /><br />Park worker, Khun Nalon, 40, was then seen plunging into the water on an inflatable ring to paddle after the stricken pair. <br /><br />He caught up with them further downstream and helped to drag them to the shore. <br /><br />Speaking after, Nalon said: ''I saw the men and was hoping they could hold onto the tree but then they let go.<br /><br />''The water is very dangerous so they were not safe. I could not leave them. I am a good swimmer so I jumped in to help them.''<br /><br />The Khao Yai National Park where the rescue happened is a popular nature reserve which was packed with locals who had the day off for a national holiday celebrating the country's annual Mother's Day. <br /><br />Sudden monsoon downpours caused the streams to burst their banks - sending tonnes of water spilling over.<br /><br />Hundreds of visitors were stranded in a resort inside the sprawling park with water levels too high for them to leave. They had to wait until evening when the water had subsided. <br /><br />Park official Wichai Pornleesaengsuwan said the flash flood was caused by heavy rainfall coming down from the mountains. <br /><br />He said: ''This is the worst flooding I have seen here for ten years. We are trying to ensure that everybody is safe and there are no injuries.''
