On Wednesday 4 June at 10:00, 50 chemical risk sirens will be activated across 22 municipalities in the Barcelonès, Baix Llobregat, Vallès Occidental and Vallès Oriental districts.
The exercise is part of a shelter-in-place drill organised by Civil Protection of the Catalan Government.
It has two aims: to assess how the public reacts to a possible chemical accident, and to check that the outdoor sirens work properly in industrial areas with chemical risk.
🔊 Lafcarr: behind many of these sirens… and their maintenance
For more than two decades, Lafcarr has designed, manufactured, installed and maintained complete outdoor audible warning systems. These systems are part of the siren network that will be activated during the drill on 4 June.
Our technology is designed specifically for industrial and urban areas, where it is vital that the alarm signal is heard clearly and quickly, even amid high background noise.
Regular maintenance of this equipment, in partnership with public bodies, ensures it works when it is needed most.
🗺️ Where will the sirens be heard?
The drill will activate 50 sirens in the following municipalities:
| District | Municipalities and number of sirens |
|---|---|
| Barcelonès | Barcelona (5), L’Hospitalet de Llobregat (3) |
| Baix Llobregat | Cornellà (2), El Prat (5), Viladecans (1), Sant Boi (3), Sant Joan Despí (2), Sant Feliu (1), Santa Coloma de Cervelló (1), Sant Andreu de la Barca (1), Martorell (5), Abrera (2), Olesa de Montserrat (2), Esparreguera (1) |
| Vallès Occidental | Castellbisbal (3), Polinyà (2), Santa Perpètua de Mogoda (1), Terrassa (3) |
| Vallès Oriental | Granollers (3), Lliçà de Vall (1), Montornès del Vallès (2), Parets del Vallès (1) |
In addition, mobile phones in the area will receive an emergency alert via the ES-Alert system as part of the exercise.
✅ What should you do if you are in one of the affected areas?
Although this is not a real emergency, it is important to know how to respond correctly to a shelter-in-place signal:
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🔒 Go into the nearest building.
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🚪 Close doors and windows.
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❌ Switch off ventilation and air conditioning.
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🛑 Do not go out until you hear the end-of-alert signal (a continuous 30-second tone).
During the drill, a one-minute wailing signal will sound twice to indicate sheltering in place.
➡️ Read Lafcarr's 2025 Chemical Risk Guide for all the protocols, steps to take and more so you are prepared for a chemical emergency.
Committed to public safety
At Lafcarr we have spent years working with Civil Protection and other public bodies to install and maintain sirens in chemical risk areas. It is technical, low-profile but crucial work.
Because when a siren sounds, every second counts… and everything must work precisely.
On 4 June, while the drill takes place, our team will be on hand as always.
📎More information from Catalan Civil Protection: Proves de sirenes. Departament d’Interior i Seguretat Pública
If you live in Tarragona: 29 May at 16:00
👉 You can also check when and where the Tarragona drill on 29 May will take place, with 55 sirens activated in 16 municipalities.
Do you work in a municipality or industry with chemical risk? Contact us to find out how we can help.
