From khnl.com:
Island wide power outage on Oahu may last 12-24 hours
Posted: Dec 26, 2008 10:57 PM
Updated: Dec 27, 2008 02:45 AM
HONOLULU (KHNL) - Rare Hawaii thunderstorms caused an island wide power outage on Oahu at around 6:45 PM Friday night as after-Christmas sales were in full swing and the vacationing President-elect of the United States wrapped up a day of sightseeing. A spokesperson for Hawaiian Electric Company (HECO) along with Honolulu mayor Mufi Hannemann reported around 9:00 PM Friday that electricity would be out for most of the island of Oahu for 12-24 hours.
At 6:30 PM Friday night a thunderstorm caused an interruption in power which shut down all but one of HECO's power generating stations. Early reports indicated that Makakilo and Nanakuli were spared from the blackout but at around 8:30 PM the Kahe power plant went offline, leaving all of Oahu in the dark.
At around 10 PM Friday night, power began to come back online sporadically in leeward areas, particularly in areas near Kahe power plant.
Mayor Hannemann reported at 10:10 PM that he had been in contact with President-elect Obama's staff and that the president-elect and his family were holding up well and were getting ready to go to bed. Obama is vacationing in Kailua. Governor Linda Lingle told KSSK radio that HECO had offered backup generators to the president-elect but was not able to confirm that the generators had been delivered.
Radio station KSSK is reporting that mainland bound flights are leaving Honolulu International Airport, with the exception of United Airlines, which has postponed flights until Saturday morning. Hawaiian and Mokulele airlines are operating interisland flights. Travelers should expect delays on all flights.
The Hawaii Superferry will depart Honolulu Saturday morning as scheduled (first voyage).
Police are asking residents to use 911 service for emergencies only. Avoid travel but if you must drive, treat all intersections as a four-way stop.
Water supply officials urge all residents to conserve water. Hospitals are operating under emergency power.