A boil advisory is in effect for the central Iowa town of Roland after a water main break this morning. The situation led officials at Roland-Story Middle School to send students home early. Dave Perry, with the Iowa Department of Natural Resources, says residents receiving water from the city of Roland should boil the water before using it for drinking or cooking.

“It hasn’t been verified that there is a problem with the water, it’s just a precautionary measure,” Perry said of the boil advisory. The water main break has been fixed, but the advisory will likely remain in place for several days.

Perry said the advisory will be lifted after two consecutive sets of samples verify the system is free of coliform bacteria. Classes will resume at Roland-Story Middle School on Wednesday. Parents are being asked to send bottled water with their children to school.