Warning systems
Sirens and national alert signal
Sirens: France uses the SAIP national warning and information system with sirens. The real alert signal consists of three rising and falling sequences of 1 minute and 41 seconds each, separated by short pauses.
The all clear is announced by a continuous tone lasting 30 seconds. If sirens sound, seek shelter inside a building, follow radio or official information, close doors and windows and use the phone only in a real life threatening emergency.