How We Learned to Live With Water at the Doorstep

There is a question schoolchildren ask that historians have learned to dread: when did the water start coming in? The honest answer is that it never started, because it never stopped. The coastal cities that now sweep salt from their thresholds each high tide — Lagos, Jakarta, a hundred others — did not cross a single dramatic line. They crossed ten thousand small ones, a seawall raised a hand's width one year, a pump added the next, a doorstep set on cinder blocks the summer after. The global mean anomaly has held at or above +2.8°C for months now, and each fraction of that warmth arrived as arithmetic, not catastrophe. This is how a civilization actually adapts: not in the flood of a headline but in the ledger of a thousand ordinary Tuesdays, each one a little wetter than the last, each one survived. The danger of that slow arithmetic is not that we fail to notice. It is that we notice, and call it normal, and are right.