Severnside emergency siren network expanded
A network of emergency alarms designed to warn of chemical or petroleum accidents on the Bristol Channel coast has been expanded.
The Severnside Siren system was set up in 1997 and covers the area between Redcliffe Bay and Portishead.
It is run by a charitable trust under the control of Avon and Somerset Police.
The new siren, which goes live on Wednesday, covers the Hallen fuel depot and surrounding areas.
In the event of a major incident the sirens are activated to provide a warning to businesses and residents in the area.
The alert warning is a rising and falling tone lasting three minutes and the all clear is a steady tone that lasts for one minute.
All the sirens are tested on the 3rd day of every month at 15:00.
If they are heard at any other time people should go indoors closing windows and doors and listen to local radio for further advice.