Michael E. Kanell and Ty Tagami, writing in the AJC about

More than 16,000 flood-related claims filed in Atlanta area,
quote Robert Klein, professor of risk and insurance at Georgia State University:

Moreover, the maps that set out those high-risk areas are “woefully
inadequate,” he said.

Maps should be recalibrated to account for continued development and
sprawl, he said: destruction of trees, paving of roads and parking lots,
addition of new homes to older areas and landscaping all change the way
water drains — or doesn’t drain.

And maybe somebody should do something about that continued development and sprawl.