HONOLULU (KHON2) — Hawaii Department of Education has cancelled classes and extracurricular activities at Kalaheo High school, due to a sewer line break.

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A 24-inch water main break Sunday wreaked havoc in Kailua, shutting down streets and possibly affected the school.

The incident occurred around 7 a.m., flooding parts of Mokapu Boulevard — which fronts Kalaheo High School — between Kapaa Quarry Road and Oneawa Street.

Board of Water supply said one Kaneohe-bound lane will be open Monday from 5 a.m. to 8 a.m., to assist with morning traffic.

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The road will close again at 8 a.m. for repairs.