(AP) — Hundreds of students at a Lincoln school had to stand out in the cold after a burst pipe triggered a fire alarm.

Freezing water broke a pipe at Huntington Elementary School. When it thawed Tuesday afternoon, it sprayed water inside the school, triggering the fire alarm.

About 480 students had to leave the school and then wait about 15 minutes while firefighters checked the building to ensure there wasn’t a fire.

Although it was a chilly wait for students, the temperature had climbed Tuesday to above freezing. The high was 39.