WOODBURY - The Long Island Power Authority is scrambling to restore power to hundreds of thousands customers after Irene whipped across the Island today.

More than 400,000 customers in Nassau and Suffolk remained without power late Sunday evening.

The utility says it's the most outages it has had at one time since Hurricane Gloria hit 26 years ago.

County Executive Ed Mangano says customers could be without power for the next 2-6 days. Mangano said 20 transmission lines were knocked out in the storm, posing huge problems for LIPA crews to tackle.

They are urging customers without power to visit their website or call their hotline at 1-800-490-0075 to report outages.

LIPA says it has begun to restore power to Fire Island, which was intentionally de-energized after it had been under mandatory evacuation orders for all residents.Cuomo: NY outages could last daysReport an outage to LIPA onlineLIPA Outage Map