(KHNL) - Honolulu firefighters were called to HECO headquarters Wednesday evening around 5 PM. HECO officials say there was work going on at the Archer substation on Ward Avenue.
Crews were doing something called "switching" - which involves transferring customers from one circuit to another.
Something went wrong and caused a power outage. It affected primarily the Ward/Piikoi area; also parts of Ala Moana area.
About 5,000 customers were affected.