(Lynn, IN)--Lynn is under a water boil advisory Thursday.  On Wednesday afternoon, a water main ruptured causing water to drain from the tower.  Lynn residents were without water for about an hour.  When the problem was fixed, a boil advisory went into effect that continues through Thursday.  Town officials say the water could be discolored but is fine for bathing and laundry.  It should not be used for drinking or cooking without being boiled first.