The power grid is fairly faulty around here, we have power blips and brown-outs (black out lasting seconds) all the time. to the point of my boss installing 20 UPS all over his gas station. 1 each register, the satellite link(lottery and CC transactions), each pc in the office, and miscellaneous items that really don't like being ungracefully shut off.
at least once a year the woodland creatures stage a revolt and quick-fry themselves on tower transformers and relay stations. this year alone, 3 squirrels have taken out the county's grid. (not to mention the guy with the backhoe who ripped the wires off the pole, idiot's lucky to be alive) In previous years, we had a raccoon who decided the local power relay station would be a cool place to nest, started to renovate his new den, and took us offline for 3 days.
Now in winter, we are blessed with many feet of snowfall, and the branches push on the lines. the power companies hire tree cutting services to clear problem trees from the right of way, but sometimes a tree sags just right from the weight, and oops, there go the lights. most homes have a gas generator just for this, (I have 2 in my garage, no fun finding out one won't start when you need it)
And this is just northern WI, i imagine some areas a bit further north with a sparse population density could have it worse.