SWEPCO, which has already started restoring power to customers, noted on its Twitter page that "Many roads are blocked by some of the same downed trees that took down power lines." SWEPCO provides service to around 543,000 customers in Texas, Louisiana and Arkansas. SWEPCO is a unit of U.S. energy company American Electric Power (NASDAQ: AEP ) Co Inc. Units of U.S. energy company Entergy Corp (NYSE: ETR ) had the second most outages with around 85,000 customers without power mostly in Louisiana and Mississippi. "While some customers have already been restored, complete restoration will take time in the hardest-hit areas," Entergy told customers in Louisiana on its website. Entergy provides power to around 2.9 million customers in Texas, Louisiana, Arkansas and Mississippi. Major outages by state: State Outages Texas 212,300 Louisiana 176,600 Mississippi 161,500 Alabama 35,500 Florida 78,100 Total Out 664,000