Climate change will mean more epic floods — but the damage doesn’t have to be this bad.

Flying over Illinois and Missouri in a small plane, I look down on farmland that, by now, should be a carpet of green corn and soybeans. But all I see are brown, empty fields, speckled with standing water and the sun glaring off of silver seas behind broken levees. I am up in the air with Lighthawk to survey the damage — so far — from this…