In Del Norte, Colo., Public Works Supervisor Kevin Larimore shows off solar panels that provide electricity for the town's water supply. Despite generating its own solar energy, the town is still at risk of a blackout if its main power line goes down.
Dan Boyce/Inside Energy
Part of the Robert Moses Niagara Power Plant in Lewiston, N.Y., is seen from the air on Aug. 14, 2003, during a massive power outage that stretched from New York to Detroit and into Canada.
David Duprey /AP