All-Hazard Statewide Outdoor Warning Siren System

Click here or on the image below to view the interactive siren status map

An image of the HI-EMA Siren Status Map showing the locations of the sites of All-Hazard Statewide Outdoor Warning Siren System statewide. It is color coded to reflect their status, showing green for operational, yellow for needs maintenance, red for needs maintenance with contracting support, and black for beyond repair.

Watch these short videos to learn more about the All-hazard Statewide Outdoor Warning Siren System.

Siren photos.

 

Siren fast facts.

  • Hawaiʻi has the largest single integrated Outdoor Siren Warning System for Public Safety in the world.
  • The all-hazard siren system can be used for a variety of  both natural and human-caused events; including tsunamis, hurricanes, dam breaches, flooding, wildfires, volcanic eruptions, terrorist threats, hazardous material incidents, and more.
  • The sirens output is 121 decibels and propagate with a manufacture radius of 3400ft.  This range may vary due to environmental and surrounding physical conditions. The sirens are battery-powered and use a photovoltaic charging system.
  • The sirens are one part of the larger Hawaiʻi Statewide Alert and Warning System (SAWS) which includes FEMA’s Integrated Public Alert & Warning System (IPAWS) which used both the Emergency Alert System (EAS) and Wireless Emergency Alerts (WEA) to alert the public.
  • The sirens, along with the EAS, are tested on the first business day of each month in collaboration with County Emergency Management/Civil Defense Agencies and local Radio/TV/Cable broadcast partners.
  • When a siren tone is heard other than a scheduled test, tune into local Radio/TV/Cable stations for emergency information and instructions by official authorities. Alerts may also come in form of a Wireless Emergency Alert.