A nationwide warning day will take place on 8 December 2022. On this day of action, the federal and state governments as well as the participating districts, independent cities and municipalities will test their warning devices in a joint exercise.
There is a detailed website with all the information you need: https://warnung-der-bevoelkerung.de/
In the municipality of Rüdersdorf near Berlin, the warning day will have the following effects:
11 am:
- Triggering the sirens: Sirens one-minute wave tone
- Cell broadcast is triggered (no app required)
- Warning apps such as Nina and BIWAPP are triggered; a warning should also be issued via the Rüdersdorf bei Berlin app.
- The municipality's website will be subjected to a stress test and we will issue a test warning.
11.45 am:
- All-clear
- Sirens emit a one-minute continuous tone.