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Civil security exercise at the Grand Lyon water plant in Rillieux-la-Pape and tests FR-Alert on 17 September 2026

On Thursday September 17 2026 from 08h30, a civil safety exercise will be conducted at the Grand Lyon water plant in Rillieux-la-Pape (Crepieux), under the authority of the Prefect du Rhône. In the morning, the EN-Alert alert system will be tested several times with the inhabitants of Rillieux-la-Pape and users of the RD 484. Persons who receive the notification will not have to take any action: the mention "exercise" will be explicitly indicated.

From news to action

Who is concerned

The inhabitants of the town of Rillieux-la-Pape holding a mobile phone and road users using RD 484 on the morning of 17 September.

What to do

If your phone issues a specific audible signal with an FR-Alert notification on the morning of September 17, 2026 in Rillieux-la-Pape or on RD 484, do not adopt any specific protective behaviour: this is an exercise, which will be explicitly stated in the message. Simply read the notification and continue your activities. The exercise is not open to the press.

Official sourcePréfecture du RhôneUn exercice de sécurité civile organisé sur l'usine d'eau du grand Lyon à Rillieux-La-PapeOfficial source ↗

Background

Every year, many civil security exercises are organised in the Rhône under the authority of the Prefect. State services, local authorities, operators and carriers intervene in conditions close to real life in order to test their capacity to respond to emergencies (accidents, disasters, disasters). This exercise focuses on a strategic drinking water site in the Lyon metropolis.

Why it's important

It is essential not to confuse the test with a real alert. FR-Alert is the new cellular alert and information system: it warns in real time anyone who holds a mobile phone of their presence in a danger zone and informs them of the behaviours to adopt. Knowing the format of the exercise message avoids panic.

What Changes

On September 17, 2026, FR-Alert will be tested several times in the morning with the populations of Rillieux-la-Pape and users of RD 484, with a specific sound signal and the mention "exercise".

Useful details

  • The exercise takes place on Thursday 17 September 2026 from 08h30 at the Eau du Grand Lyon plant in Rillieux-la-Pape (Crepieux).
  • FR-Alert will be tested several times in the morning on the town of Rillieux-la-Pape and with users of RD 484.
  • Persons receiving the notification with audible signal will not have to take any action or shelter to be carried out; the mention "exercise" will be indicated.
  • FR-Alert enables anyone who holds a mobile phone to be alerted in real time to their presence in a danger zone and informs them of the behaviour to be adopted.
  • This exercise is not open to the press.
  • The Rhône prefecture page has been updated to 16/09/2026; the site is licensed andalab-2.0.

Terms to know

FR-Alert
National cellular population alert and information system: notifications with audible signal are sent to mobile phones in a danger zone.
Préfet
State representative in the department, responsible in particular for organizing civil security exercises.

Check the conditions before taking action: Vitalpes explains the context and returns to the official source, without replacing a personalized advice.

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