Board of Water Supply crews are responding to a 12-inch main break on Kaluanui Road at the Kanakou Place intersection in Hawaii Kai.
The break is affecting all customers from Kaahue Street to the top of Mariners Ridge.
One lane is closed on Kaluanui Road between Kapa Place and Kalahu Place. Motorists traveling near the main break site are advised to exercise caution and to expect delays.
A water wagon is positioned near the intersection of Kalahu Place and Kaluanui Road. In addition, two roving water wagons are being dispatched.
The main break was reported at approximately 1:10 a.m.
Repairs are expected to take place throughout the day and possibly into the evening.