OSSIAN, Ind. (WANE) – A water main break late Monday night has caused a boil water advisory that is likely to last until Thursday, according to town officials. A water main broke at roughly 10:45 p.m. Monday and was fixed just before 7 a.m. this morning. While water has been restored, officials issued a town-wide boil order that is expected to end at 6 p.m. Thursday.