Warning Infrastructure Being Tested Nationwide
Another goal of Warning Day is to familiarize the public with the various warning methods, as well as the corresponding warning signals and information channels.
On this day, the Federal Office for Civil Protection and Disaster Assistance (BBK) will activate all available warning systems nationwide at 11:00 a.m. via the Modular Warning System (MoWaS), such as warning apps and radio alerts. In the Ludwigsburg district as well, more than 130 sirens will be activated at 11:00 a.m.
The “one-minute wailing tone” warning signal indicates danger
In an emergency, the warning signal “One-minute wailing tone” means: There is an immediate danger in the area, or such a danger is expected shortly. The public should use all available information channels for further updates. These will be broadcast by all local and regional radio stations. In addition, official instructions must be followed.
At 11:45 a.m., the all-clear is given with the signal “One-minute continuous tone.” This indicates that there is no longer any immediate danger. Even after the all-clear, all available information sources should be used to obtain further updates.
Not all municipalities have sirens
Some cities and municipalities in the district do not have sirens: Ludwigsburg, Korntal-Münchingen, Marbach am Neckar, and Vaihingen an der Enz. Eberdingen’s sirens are not connected to the general disaster alert network but are used to alert the local fire department.
In cities and municipalities without sirens, the public is alerted in an emergency via loudspeaker trucks, the federal government’s NINA app (Emergency Information and News App), and additionally via cell broadcast.
Test Alert via Cell Broadcast
On this year’s National Warning Day, a test alert will once again be sent via cell broadcast. Cell broadcast is a mobile communication service that sends warning messages directly and anonymously as so-called push notifications to all smartphones or cell phones
registered within a specific section of the mobile network, known as a cell.
To receive the alert, mobile devices must be turned on and not in airplane mode. No all-clear alert is sent via cell broadcast.
Further Information and Feedback Opportunities
You are welcome to share your own experiences and observations regarding the 2026 Alert Day and to participate in the BBK survey. Those interested can access the feedback channel on September 10, 2026, starting at 11:00 a.m. at www.warntag-umfrage.de.
Further information on the nationwide Warning Day is available at www.bundesweiter-warntag.de.
