Hmm, I think I would have to say the Brooklyn tornado just a couple of weeks ago! I live right where it hit shore after crossing from Staten Island (and I do mean literally right at the spot), Fortunately no structural damage to my building but boy, did it leave a mess. They're still cutting down wrecked trees and there's blue tarps over the roofs of a bunch of houses not far away. Still, in the scheme of things, pretty minor compared to a lot of other natural disasters.