I need a siren sound

Question

If you get one please post

Answer 1

Google "cc0" and "siren". Find.
https://pixabay.com/en/sound-effects/search/siren/

Make sure that they are published under a license that allows use for your purposes.

Answer 2

Orion , you can try pixabay sound effects too.

https://pixabay.com/sound-effects/