In Senator Joe Manchin’s hometown, a flood-prone hamlet of about 200 homes that hugs a curve on a shallow creek, the rain is getting worse. Those storms swell the river, called Buffalo Creek, inundating homes along its banks. They burst the streams that spill down the hills on either side of this former coal-mining town, pushing water into basements. They saturate the ground, seeping into Farmington’s aging pipes and overwhelming its sewage treatment system. Climate change is warming the air, allowing it to hold more moisture, which causes more frequent and intense rainfall. And no state in the contiguous United States is more exposed to flood damage than West Virginia, according to data released last week. From the porch of his riverfront house, Jim Hall, who is married to Mr. Manchin’s cousin, recounted how rescue workers got him and his wife out of their house with […]