Here you can find a set of buttons that can be used to announce the various emergency types in the sound system of the Firefighters headquarters.
Deployed @ https://bve-alarms.netlify.com/
Siren sound from: http://soundbible.com/mp3/Warning%20Siren-SoundBible.com-898272278.mp3 respecting the following license: https://creativecommons.org/licenses/by/3.0/pt/deed.en