A pipe burst in Service High School Monday morning, leaving parts of the school building without water and electricity.
The 1,700-plus students were evacuated and eventually dismissed for the rest of the day, Principal John Gaskins said.
A water main that maintains the sprinkler system broke, sending about a foot of water into a hallway and the kids outside of the building and into the mid-40s weather.
"Whenever the water starts flooding like that or we have low pressure, the alarm goes off and we evacuate," Gaskins said.
Students put up no resistance at the prospect of going home early on a spring day.
"When we told them they were going home, you know, they cheered," he said.
About 100 kids were left at school and were taken home by bus at 2 p.m. ASD spokesperson Heidi Embley said class will resume as usual on Tuesday.