In coastal Texas and many other places, walled cities are making a comeback. It’s quite a turnabout, as the efficacy of defensive walls had declined precipitously since the age of the long bow. Barbarians still menace, of course. But the rekindled enthusiasm for defensive walls is a response to a different kind of threat.
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Two consecutive summers of brutal heat and drought have left some parts of Texas with notably low water supplies going into 2024. A wet year or a well-placed hurricane could qui