A 12-inch main break in front of Keolu Elementary School has closed Keolu Drive in both directions this afternoon.
Board of Water Supply crews are working to repair the damaged pipe, which was reported just before 1 p.m.
The main break cut water service to the school, a church and a park.
The road is closed between Keolu Drive and Akamai Street.
Work to repair the main, originally installed in 1970, is expected to continue until tomorrow.