Overview
- The high‑voltage dip lasted a fraction of a second yet knocked out many traffic signals, briefly halted city trams and triggered false fire alarms across Stuttgart.
- Police were deployed to manage major intersections, the tram operator reported quick resumption with minor delays, and S‑Bahn and airport operations were unaffected.
- Vodafone said about 5,250 customers lost internet and phone service for roughly 15–20 minutes, while Telekom also reported short‑lived interruptions.
- Stuttgart Netze ruled out external interference and said protection systems tripped as designed, leaving some installations requiring manual reactivation, including signal controls.
- Power and communications were stabilized by midday, and operators said they are reviewing the incident and implementing follow‑up measures.