A mini-tornado struck the commune of Oissel-sur-Seine and its surrounding areas on Wednesday, September 30, 2026, around 17:30. The event, described as a small-scale tornado, impacted approximately 100 homes in the region. The Departmental Fire and Rescue Service (Sdis) is currently assessing the full extent of the damage. No injuries have been reported, and the situation is being managed by emergency responders. The tornado occurred near Rouen in the Seine-Maritime department, a region known for its coastal landscapes and historic towns. According to the Sdis, firefighters, city services, and ENEDIS (the national electricity distribution company) are working together to evaluate the damage. The Tourville-la-Rivière shopping center also reported some damage, and numerous rescuers have been deployed to the area. Both municipal and national police are present to assist with the response. At 20:00 on Wednesday, 15 emergency vehicles and 31 firefighters were on site, including a specialized team from the Unité de Sauvetage Appui et Recherche (USAR), which is trained in search and rescue operations. The CODIS, a coordination system for major incidents, activated level 1 for managing the event, indicating a moderate but significant emergency response. The tornado occurred during a period of severe weather, with a strong rain cell contributing to the phenomenon. Alertes météo Normandie, a regional weather alert service, noted the event. The Seine-Maritime department had a yellow alert for thunderstorms in effect on Wednesday until 21:00, warning residents of potential heavy rain, lightning, and strong winds.