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A civil defense siren is a siren used to provide an emergency population warning to the general population of approaching danger. Initially designed to warn city dwellers of air raids (air-raid sirens) during World War II, they were later used to warn of nuclear attack and natural disasters, such as tornadoes (tornado sirens).
Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines. Many fire sirens (used for summoning volunteer firefighters) serve double duty as tornado or civil defense sirens, alerting an entire community of impending danger. Most fire sirens are either mounted on the roof of a fire station or on a pole next ...
In some tornado-prone regions, tornado sirens, if present, are usually activated within the specified warning region or an entire municipality—varying in coverage based on if a local siren network maintains a sector-organized relay structure—to inform people that a tornado has been sighted or may be forming nearby. Because sirens are ...
The upgrade plan does not include Shelby, which maintains four tornado sirens. In other business Tuesday, commissioners approved a $910 base contract with Truly Nolan Pest Control to deal with a ...
Ashland County commissioners gave their OK to replace the tornado siren located near Dale-Roy School at a cost of about $33,000. Homeland Security and EMA Director Anne Strouth gave an update on ...
This siren is similar to Federal Signal's Thunderbolt series. Only a single unit remains in service in Milwaukee, WI. Screamers Electro-Mechanical 2, 5, 7.5, 10 8, 9, 9/12, 10/12 1968–1994 Omni Directional 102–115 dB at 100 ft. Series of small vertical sirens, comparable to Federal Signal Corporation's vertical sirens. Sentry 95
Commissioners accepted a quote from VASU Communications in the amount of $28,370.07 for the removal of the tornado siren at Edison School and the purchase and installation of a new tornado siren ...
The Modulators in Chicago's siren system formerly used to run on the Alternate Wail tone during tornado warnings in order to vary from emergency vehicle sirens. However, in O'Hare International Airport, instead of using the main UV Wail or Attack, they use an Eclipse 8 (possibly) sound card doing attack. Before that is the Westminster Chimes ...