National Warning Day on September 11, 2025—starting at 11 a.m.

On September 11, 2025, the federal government and the states, together with the participating counties, independent cities, and municipalities, will test their warning systems. The goal is to review procedures for a potential disaster or crisis. Cell phones, radio, or sirens: Thanks to a wide range of warning options, different segments of the population will be targeted specifically. The drill begins at 11:00 a.m. and ends at 11:45 a.m.

On September 11, 2025, starting at 11:00 a.m., a test alert in the form of a text message will be sent to all alert disseminators connected to the federal government’s Modular Warning System (MoWaS for short), such as radio stations and app servers. The warning multipliers will relay the test alert with a time delay to warning channels such as television, radio, and smartphones. There, the alert will then be visible and/or audible to everyone. At the state level, as well as in participating counties and municipalities, local alert channels may be added (such as loudspeaker trucks or sirens).

The all-clear will be issued around 11:45 a.m.

The nationwide warning day usually takes place annually on the second Thursday in September—and is intended, among other things, to raise public awareness of procedures in the event of a crisis.

Further information is available on the website of the Federal Office for Civil Protection and Disaster Assistance: www.bbk.bund.de.