I don't know how we missed this chart on its first go-around (it was created by Eli Dourado in May 2014, using data extrapolated from a 2013 op-ed by Jon Mooallem, who spent the summer of that year keeping track of power outages caused by squirrels), but it is everything, and you deserve to know that it exists.

H/t Adam Thierer, who observes that the squirrels' grip on humanity's infrastructure continues to tighten.