It just so happens that most cities with a lot of skyscrapers are situated in places where tornado-feeding conditions evolve less frequently. But tornadoes do in fact sometimes hit cities, says Gary Conte, a warning coordination meteorologist at the Upton, New York, outpost of the National Weather Service, citing recent touchdowns in Dallas, Memphis, Miami and four of New York City's five boroughs (Manhattan has been spared, so far). Skyscrapers and topography don't matter. "Tornadoes form thousands of feet above building tops," Conte says. "Skyscrapers won't prevent the funnel from coming down, but they might influence its shape so that it doesn't look as nice and neat as it does on a flat surface like the plains. That doesn't make it any less of a tornado, though."