The water main break happened at about 11 p.m. Wednesday.
According to the BWS, about 10 customers are without water service at this time. A water wagon is set up in Poepoe Place for these customers.
Honolulu police have closed one of the two Ewa-bound lanes of North King Street near Poepoe Place while BWS crews repair the broken main.
Motorists are urged to avoid the area if possible.