|emergency = siren|
|A loud noise maker, such as an air raid siren or a tornado siren.|
|Used on these elements|
|Status: de facto|
|Tools for this tag|
Ais a loud noise maker.
They are used to alert the people to some danger that requires them to move to a safer areas. Example dangers are tornado, tsunami, earthquake.
There are two general types, pneumatic and electronic.
suggested by User:Chrisana13