Squirls

Facts no one should live without:

“On any given day, five hundred thousand people in the United States are without power for two hours,” Gellings says, “A lot of it is squirrels.”

Of course the article isn't entirely about squirrels. But then again...

Distributed generation—producing electricity at or close to the source of consumption—such as solar cells or wind turbines operated near homes and businesses, can also help alleviate some stress. As Vaitheeswaran explains, the “dumbest” part of the grid is the last mile of lines leading to a consumer’s home.

Presumably that's where the squirrels hang out.