How We Learned to Fear the Afternoon

Every generation believes its emergency is the first of its kind, and the month just ended — a city sealing itself against the noon sun — felt to many like a threshold newly crossed. It was not, quite. The retreat from the afternoon has been underway for the better part of a century, in increments small enough to pass for ordinary: a shifted school day here, a nocturnal harvest there, a market that quietly moved its hours to dawn. What the plus-two-point-eight decade did was gather those increments into something a city could feel in a single month. The historian's discomfort is that thresholds, seen up close, are almost never thresholds; they are the moment a slow accumulation becomes visible. A sealed city is not a lost normal newly returned so much as the visible edge of a normal that civilizations across the warming belt have been quietly leaving for decades — Seville and Karachi and Riyadh long before any dome. The value of the shock is that it lets us see the drift. The danger is that we mistake the shock for the whole story, and forget the drift the moment the sky clears.