By Joann Shin
(KHNL) - Carole Hara and daughter Alexandra waited to the last minute to throw away everything in the refrigerator.
Her neighborhood in Aina Haina was one of the last to get power.
Hara said, "I hoped the fridge would stay cold, but this morning I went to open it up and it was pretty warm."
Electricity was restored there at 3:00 Monday afternoon.
According to Hara, "I kept thinking at some point it's going to get back on, but it didn't."
Jose Dizon with Hawaiian Electric Company says the island's system is so advanced, it's more difficult to re-start.
Dizon explained, "On Oahu, our units are bigger, it takes a long time to warm up and we want to make sure we don't go too quickly and cause damage that will take months or many months to repair."
The state is now waiting for an explanation and briefing from HECO.
"What happened exactly and what we can anticipate happening in any future disruption," explained Governor Linda Lingle.
Based on the information it receives, the Public Utilities Commission will decide whether to launch a formal investigation.
Drivers also ran into problems with traffic signals not working.
City officials said about 150 signals were still not working Monday morning. By 4 p-m, that number dropped to 15.