Hi-Lo Siren

This European Siren produces an "unfamiliar sound", however it has a major role in alerting the public of emergencies. When you hear this siren, seek media news (television, radio, reliable social media news sources) immediately. This plan was developed by Napa County Sheriff, John Robertson (retired). Sonoma, Solano, and Lake County Sheriff's Offices have joined Napa County in implementing the Hi-Lo Siren.