Overview
- The same strong metallic, fire‑like odor spread across Siegen’s city center on Tuesday and prompted overnight responses from the fire brigade and the city environmental office.
- Responders checked local industry sites and the sewer system but were unable to locate a clear source for the smell.
- Authorities alerted residents through the Nina warning app and said air measurements show no evidence of hazardous airborne substances.
- Officials blamed a weather inversion for slowing dispersion of the odor and said the smell was unpleasant but likely not dangerous.
- The county’s Immissionsschutzbehörde is preparing a follow‑up report and the Kreis has notified the Bezirksregierung in Arnsberg as investigations continue.