Tornado-Proofing Cities in the Age of Extreme Weather

Right now the death toll from the massive tornado that hit Moore, Oklahoma on May 20 seems—thankfully—to be less than first thought. City officials now say that 24 people have been confirmed dead, down from 51 people last night, due to double counting of some bodies in the confusion. But the new number still includes 9 children, and the toll could rise as rescuers search through the rubble. This is the second time in less than 15 years that the town of Moore, a suburb of Oklahoma City, has been hit squarely by a major tornado. That’s mostly down to bad luck—although Oklahoma City area might as well be the buckle of the tornado belt, as Alexis Madrigal points out in the Atlantic, the chances of actually being hit by a major tornado even in this danger zone remain low. Though I doubt that will provide much comfort to the grieving residents of Moore as they dig out from yet another destructive twister. But as unlikely as a major tornado remains, the hundreds of twisters that touch down in the U.S. still cause major damage—second only to hurricanes, according to the reinsurer Munich Re. Few ordinary structures can withstand a direct hit from a tornado as strong as the one that passed through Moore yesterday, which now ranks as an EF5, with winds above 200 mph. Not much could have saved the homes and businesses destroyed by the Moore twister, but is there a way to ensure that the lives of people in tornado country can be protected from extreme weather? The answer is yes—with the right policy and the right incentives. But first we have to understand how the risks from extreme weather are changing—and for the most part, increasing. (Hat tip to Andrew Revkin of Dot Earth, whose post earlier today touched on much of this material.) As I wrote yesterday, there’s no clear trend on the frequency or strength of tornadoes hitting the U.S. It had actually been a historically quiet 12 months for tornadoes until recently. … Continue reading Tornado-Proofing Cities in the Age of Extreme Weather