Students who attend Longfellow Elementary School will get an unexpectedly long Labor Day holiday.

A toilet pipe burst in a second-floor bathroom during the weekend, flooding halls and administrative areas of the school.

Classes were canceled for Tuesday, and Principal Rose Beebe said she did not know when school would reopen for its estimated 300 students.

“We’ll take it on a day-by-day basis,” Beebe said Monday. “We need to be sure the building is safe for kids to come back in, and that the carpet is dry enough for traffic.”

Al Musser, the Boise School District’s area director, said the main safety concern was electrical wiring inside water-damaged walls at one of Boise’s oldest schools.

Musser said it was the worst flooding he had seen in 22 years with the Boise district, and school officials were treating it as an accident.