Climate change is making catastrophic floods more likely, and US politicians are doing little to prepare. NOAA/Wikimedia Commons After the storm, after the flooding, after the investigations, the US came to realize that what happened to New Orleans on August 29, 2005 was not a natural disaster. The levee system built by the US Army Corps of Engineers had structural flaws, and those flaws were awaiting the right circumstances. In that way, what happened was all but inevitable. And just as the storm is not to blame, New Orleans is not unique in its vulnerability. The city endured a lot of tsk-tsking in the aftermath of Katrina, as if the storm was the climax to a parable about poor urban planning. Sure, the city sits below sea level, at the end of hurricane alley, and relies heavily on an elaborate (and delicate) system of infrastructure. But where the city’s geography is unique, its vulnerability is anything but. Just about every coastal city, state, or region is sitting on a similar confluence of catastrophic conditions. The seas are rising, a storm is coming, and critical infrastructure is dangerously exposed. The basic math of carbon dioxide is pretty simple: Generally, as CO2 levels rise, the air will warm. Warmer air melts glaciers, which drip into the sea—even as the water itself warms, too. Both cause the oceans to rise. Even if the entire planet stopped emitting carbon dioxide, Earth would continue to suffer the effects of past emissions. “We’ve got at least 30 years of inertia in terms of sea level rise,” says Trevor Houser, a Rhodium Group economist who studies climate risk. And even if the sea weren’t rising, the rate of urban growth will more than double the area of urban land at high flood risk, according to a study Global Environmental Change published earlier this year. But the sea is rising, at about .13 of an inch per year, for the past 20 years. (It was rising before then, too, but at about half the rate for the preceding 80 years.) Another recent study calculated that the world should expect about 4 feet of sea level rise for every degree Fahrenheit the global average temperature rises. This puts nearly every coastal city, in every coastal state, in danger of floods. Climate Central has an extensive project looking at sea level risk, if you’re curious about your city’s risk. Read the rest at Wired. Read article here – No One Is Ready for the Next Katrina ; ; ;
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