Overview

• Sirens began at about 21:35 local time across Hamburg, prompting widespread concern and a surge of calls.
• A subsequent long, continuous tone served as the official all-clear following the mistaken activation.
• Police clarified on X around 21:46 that the alert was related to high water and explicitly said it was not an air-raid warning.
• Emergency call lines were reported overloaded, and authorities asked residents not to use the Notruf for confirmation.
• Residents posting on social media described panic symptoms and voiced anger over the false alarm.