This gets repeated so often I've come to believe it's not the right call. We need to think both bigger and smaller, and put the innovation first. We should also be looking at mitigations and adaptations, not just prevention. Is anyone researching ultra-rapid construction techniques to repair infrastructure damaged by flooding? Rapid assembly temporary bridges to evacuate people over swollen rivers? New techniques to raise entire cities like Portland was ages ago? Personal inflatable rafts with built-in emergency kits for navigation in flooded cities? Better and faster sea walls? Directing rising sea levels into below-sea-level basins through canals (Salton Sea beachfront property!)?