Alarms and behaviour guidelines

3. Instructions in case of a water-alarm

A water alarm can be recognised by its low pitched tones lasting 20 seconds at 10-second intervals. In Switzerland, a water alarm is activated only in case of danger in areas downstream of a dam, for example in the unlikely event of a dam bursting.

For who

Instructions to be followed when a water alarm is activated concern people located downstream of a dam.


Instructions

In the event of a water-alarm, instructions are the following :

  1. Leave the danger zone immediately.
  2. Listen to the radio RTS (Radio Télévision Suisse) and/or- refer to instructions issued of the smartphone app Alertswiss). These resources ensure broadcasting of information to the public 24 hours a day.
  3. Follow the instructions provided by the authorities.

Alarme eau

Last updated
10 March 2025

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