Overview
- Authorities confirm one death, a 23‑year‑old construction worker, and nine injured, including four in critical condition.
- Prosecutors in Pontoise opened a flagrant inquiry for involuntary homicide and injuries in the context of work, with the interdépartemental police judicial service leading and the labour inspectorate conducting on‑site checks.
- Roughly 80 firefighters, 50 police officers and 20 SAMU personnel were deployed as a departmental operations center coordinated evacuations and temporary sheltering in Ermont.
- Three cranes collapsed in seconds, damaging an institute for disabled children and a nearby residential building, while RER C and Transilien H service between Pontoise and Ermont‑Eaubonne was suspended until 15:00 Tuesday and about 1,700 households lost power overnight.
- Météo‑France and Keraunos describe a compact supercell or mini‑tornado that intensified rapidly over the Val‑d’Oise, highlighting the challenge of detecting such short‑lived, localized events.