A customer walks past a sales counter in a shopping mall during a blackout in Dhaka, Bangladesh, Saturday. Bangladesh was hit by a nationwide blackout on Saturday after a transmission line bringing electricity from neighboring India failed. A.M. Ahad/AP hide caption

itoggle caption A.M. Ahad/AP

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 hide caption

itoggle caption Dan Boyce/Inside Energy