That page also says: > The all-hazard siren system can be used for a variety of both natural and human-caused events; including tsunamis, hurricanes, dam brea

That page also says: > 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. > 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.