A healty adult may survive around ten days without water (temperature dependent). The Guiness book of records cites a case of 18 days without water. American coma patient Terri Schiavo died after 13 days without water. Alaskan fire fighter Robert Bogucki survived without water in an Australian desert for 12 days until he was found by a helicopter. | A healty adult may survive around ten days without water (temperature dependent). The Guiness book of records cites a case of 18 days without water. American coma patient Terri Schiavo died after 13 days without water. Alaskan fire fighter Robert Bogucki survived without water in an Australian desert for 12 days until he was found by a helicopter. |