A Board of Water Supply crew is on the scene of a water main break on Kamehameha Highway in Aiea. The 12-inch break was reported just before 5 a.m. near 98-135 Kamehameha Highway. Five customers - all businesses - are without water at this time. A water wagon will be set up in the area. Police have closed two eastbound lanes of Kamehameha Highway between Kaonohi and Pali Momi Streets.   The repairs are expected to last through the afternoon.