On Wednesday, June 4 at 10:00 AM, 50 chemical emergency sirens will be activated in 22 municipalities in the counties of Barcelonès, Baix Llobregat, Vallès Occidental and Vallès Oriental.
This is part of a shelter-in-place drill coordinated by Civil Protection of the Government of Catalonia.
The goal is twofold: to assess how the population responds to a potential chemical accident and to verify the proper functioning of outdoor sirens installed in industrial risk zones.
🔊 Lafcarr: Behind many of those sirens… and their maintenance
For more than two decades, Lafcarr has been designing, manufacturing, installing, and maintaining full outdoor acoustic alert systems. These sirens are part of the infrastructure that will be tested on June 4.
Our technology is tailored to industrial and urban environments, ensuring that warning signals are received clearly and rapidly, even under high ambient noise.
Regular maintenance in collaboration with public agencies, ensures that each siren is ready to operate at the most critical moment.
🗺️ Where will the sirens sound?
A total of 50 sirens will be activated in the following municipalities:
| County | 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) |
Additionally, as part of the test, mobile phones in the area will receive an alert via the ES-Alert system.
✅ What to do if you’re in one of the affected areas
While this is not a real emergency, it’s important to know how to act correctly during a shelter-in-place warning:
🔒 Go inside the nearest building.
🚪 Close all doors and windows.
❌ Turn off ventilation and air conditioning systems.
🛑 Stay indoors until the end-of-alert signal is heard (a continuous 30-second tone).
During the drill, a 1-minute wailing tone will sound twice, signaling the start of confinement.
➡️ Access Lafcarr’s 2025 Chemical Risk Guide to learn all the protocols, response steps, and cutting-edge technologies that will help you stay prepared for a chemical emergency:
🛡️ Committed to public safety
At Lafcarr, we’ve been working for years alongside Civil Protection and other public institutions to deploy and maintain alert sirens in chemical risk areas.
It’s a technical, often invisible task — but essential. Because when a siren sounds, every second matters.
On June 4, while the sirens are being tested… we’ll be listening too, as always.
📎 More information from Civil Protection – Generalitat de Catalunya
🔁 Related content
👉 You can also read about the chemical siren drill held in Tarragona on May 29, which activated 55 sirens across 16 municipalities.
📩 Do you work in a municipality or industry with chemical risk?
Contact us to assess how we can help improve your emergency preparedness.
