When the storm got bad, scientist Frank Vanderwal was at work, formalizing his return to the National Science Foundation for another year. He’d left the building just in time to help sandbag at Arlington Cemetery. Now that the torrent was over, large chunks of San Diego had eroded into the sea, and D.C. was underwater. Shallow lakes occupied the most famous parts of the city. Reagan Airport was awash and the Potomac had spilled beyond its banks. Rescue boats dotted the saturated cityscape. Everything Frank and his colleagues in the halls of science and politics feared had culminated in this massive disaster. And now the world looked to them to fix it.