Siren and warning signals
Sirens are an important warning system in the state capital of Mainz. They alert people to a potential danger. On this page, you’ll learn about the different siren signals, what they mean, and how you should respond when you hear a signal.
The Siren Network in Mainz
The siren network of the state capital of Mainz underwent a comprehensive upgrade between 2024 and 2026. As part of this project, 36 new high-performance electronic sirens were installed. There are now a total of 75 sirens available throughout the city.
The sirens are part of Mainz’s multi-channel warning system. They can be triggered in groups to target specific areas or larger sections of the city. This allows for the fastest and most targeted response to potential dangers.
Warnings and All-Clear Signals via Sirens
A one-minute wailing tone that rises and falls: Warning
The siren signal for a warning is a one-minute rising and falling shrill tone. This signal means: there is a potential danger.
If you hear this signal:
- Check the warning app or the media for updates and listen for announcements.
- Close windows and doors as a precaution. Turn off ventilation and air conditioning systems.
- Help others. Look out for people around you who may not have received the warning or who need assistance.
- Keep emergency lines open.
A continuous one-minute tone: All clear
A one-minute continuous tone means: The danger has passed.
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Where can I find more information after receiving a warning?
- mainz.de
- Radio: SWR, RPR 1, Antenne Mainz, Rockland Radio
- Mainz Fire Department social media channels (WhatsApp and Instagram)
- Citizen Hotline: +49 6131 99 34 34 (only in the event of major incidents)
Testing Sirens
The City of Mainz tests its sirens twice a year as part of the nationwide and state-wide warning days. These usually take place on the second Thursday in September and March. During these tests, the siren signals “Warning to the Public” and “All Clear” are sounded.