This is what Duke Energy officials told state regulators Tuesday, 10 days after rolling blackouts left some 500,000 people without power in frigid temperatures.
Potential record-breaking temperatures were forecast to linger across the Pacific Northwest, southern Great Plains and up the I-95 corridor on the East Coast.
A report highlights elevated risk of blackouts across the western U.S. Energy sector stakeholders are exploring solutions in demand, supply and policy arenas.
Iowa is in a High Risk region for power blackouts this Summer iheart.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from iheart.com Daily Mail and Mail on Sunday newspapers.