About the Electronic warning system
1,078 electronic warning sirens are installed in Denmark.
These sirens are placed on the top of buildings or on masts.
This warning system makes it possible to give warning to all urban areas having more than 1,000 inhabitants. This means that about 80 % of Denmark's population can be warned by means of the stationary sirens. The remaining 20 % will be warned by mobile sirens mounted on police cars.
The sirens have a powerful sound that can be heard over considerable distances as well as indoors.
The sirens have their own power supply, so that they can work even during a power failure. They are sturdy and simple - so they rarely break down.
The electronic sirens are connected to a data network and can be remotely controlled from police stations that are manned around the clock. From these stations it is possible to start the sirens that cover the local area where, for example, a chemical accident has occurred.
Radio Denmark (DR) is connected to same data network as the sirens. This ensures that the population will receive the necessary information and instructions via the radio at the same time as the sirens sound the alarm. You can also listen to TV2 for information and instructions.
The sirens are tested every night - without producing any sound. Once every year - on the first Wednesday of MAY - the sirens will be testet with sound.
