Will fewer than 20 metropolitan departments be orange for heatwave on August 4?

Warum: Actu.fr (published 2026-08-03) explicitly reports the Météo‑France bulletin for Tuesday 4 August 2026 and states “Toujours 18 départements en vigilance orange canicule ce mardi”, listing the 18 departments that are orange on 2026-08-04. Franceinfo (published 2026-08-03) documents 20 departments on 03/08/2026 but also notes planned downgrades (04 and 05 back to yellow at 22:00 on 03/08, and 71 and 42 back to yellow at 06:00 on 04/08), which is consistent with the reduction to 18 on 04/08. No source in the supplied evidence unambiguously reports 20 or more departments orange on 2026-08-04; the direct, dated report (Actu.fr) gives 18, i.e. strictly fewer than 20.