Neb. Rev. Stat. § 35-109: Neb. Rev. Stat. § 35-109

No siren or other similar device whose primary purpose is to warn the public of a natural or manmade emergency or disaster shall be used to notify volunteer firefighters of a fire or to summon volunteer firefighters to a fire. This section applies only to cities of the first class located within a county which contains a city of the metropolitan class.