Yesterday, twenty-four monthly heat records fell across France in a single day. The phenomenon, stripped of its meteorological drama, reveals something more troubling than climate data: the fragility of institutions we suppose robust. Schools close. Examinations are postponed. Warnings cascade from authorities to avoid public gatherings. What we witness is not merely adaptation to weather, but the provisional nature of social order when its physical foundations shift. The baccalauréat candidates in Bordeaux, Lyon, Montpellier, Poitiers and Nantes face postponement not because France lacks resources, but because we have organised education around assumptions of temperate conditions—assumptions now obsolete.

This is not a meteorological problem masquerading as sociology. It is, precisely, a sociological problem masquerading as weather. The canicule tests every assumption we make about equality before the law and equality before nature. Who can afford to leave the city? Whose employment flexes when schools close? Which neighbourhoods have trees, air conditioning, access to cool spaces? The heat does not fall equally. It concentrates its burden upon the elderly living alone, upon workers whose jobs demand exposure, upon families in poorly insulated housing, upon those who cannot escape.

What the record temperatures illuminate is the thin margin between civil order and crisis. We have built societies assuming stability. The grid that delivers cool air to some homes, the protocols that cancel examinations, the capacity of authorities to issue warnings—all of this depends upon systems designed for the normal range of a climate that is ceasing to exist. Each closure, each postponement, each warning is an admission that our institutions require conditions we can no longer guarantee.

The question is not whether we will adapt—we shall, because survival demands it. The question is whether we will adapt justly, or whether the burdens of adaptation will fall, as they always have, upon those least able to bear them. The canicule is a mirror held to the inequality latent in every system we call public. It shows us that infrastructure is not neutral; it expresses and enforces social choices. To observe the facts plainly: we know how to protect people from extreme heat. What remains uncertain is whether we possess the will to do so equitably.