Overview
- Authorities report one dead, four in critical condition and five with lesser injuries after a sudden, localized storm crossed Ermont and nearby communes including Eaubonne and Franconville.
- Three tower cranes collapsed during the event, with one striking an apartment building and another an institute for children with disabilities, as widely shared videos captured the rapid failures.
- Rail service on RER C and Transilien H between Pontoise and Ermont‑Eaubonne was suspended until 15:00 on Tuesday and about 1,700 households lost power overnight as repair teams worked to restore service.
- A departmental operations center was activated, roughly 150 responders were deployed, more than 300 interventions were logged and displaced residents were received at a municipal gymnasium.
- The police judicial service is leading the probe with labor inspectors on site, and Météo‑France and Keraunos describe a short‑lived supercell tornado that is difficult to predict at fine scale.