Overview
- The tornado hit around 17:45 local time on October 20, cutting through Ermont and roughly ten communes in Val-d'Oise north of Paris.
- Authorities confirmed one fatality, a 23-year-old construction worker, with multiple injuries reported, including four in serious or life‑threatening condition.
- Damage was extensive, with several construction cranes toppled, roofs torn off, trees downed and power infrastructure affected.
- A preliminary analysis by the German Weather Service classified the event as IF2 on the International Fujita scale, indicating winds near 220 km/h.
- Meteorologists report the parent storm was a low‑topped supercell and note the broader severe‑weather setup is progressing east toward the Low Countries and Germany.