¿Habrá exactamente 21 departamentos de la Francia metropolitana en 'vigilance orange' por la ola de calor el 31 de julio de 2026?

Por qué: Multiple reputable sources reporting Météo‑France’s official vigilances state that 21 departments are in orange for 'canicule' covering the period that includes 2026-07-31. Franceinfo (whose canicule page is generated from Météo‑France data) lists 21 departments in vigilance orange for the period 30 July 2026–01 August 2026 (therefore covering 31 July). CentrePresse Aveyron explicitly reports “Météo France maintient 21 départements en vigilance orange canicule ce vendredi 31 juillet 2026” and enumerates the 21 departments; Le Monde reports the same figure. None of the supplied evidence shows any of those departments as 'rouge' or includes overseas territories among the 21. Based on these supplied Météo‑France-derived reports, the national vigilance map for 2026-07-31 shows exactly 21 metropolitan departments in vigilance orange for canicule.