Climate change is hitting America as rain, and we’re making it worse. Two years ago, Ellicott City, Maryland, was hit by a debilitating flash flood that turned the town’s historic Main Street into a raging muddy river. Scientists said the July 2016 rainstorm was a once-in-a-thousand-year event. But on Sunday it happened again: 7 to 9 inches of rain fell in the area, 10 miles west of Baltimore, and another torrent swept cars and trees through town. It’s a reminder that heavy rain, rather than rising seas, may be the earliest severe consequence of climate change. We’ve prepared for it...