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The siren has an output of 138 dB(C) (30,000 watts), and can be heard as far as 25 miles (40 km) away. In 1952, the cost of a Chrysler Air Raid Siren was $5,500 [ 1 ] (equivalent to $65,076 as of May 2024).
Two early fire siren manufacturers were William A. Box Iron Works, who made the "Denver" sirens as early as 1905, and the Inter-State Machine Company (later the Sterling Siren Fire Alarm Company) who made the ubiquitous Model "M" electric siren, which was the first dual tone siren.
The official name of this incident by Cal Fire is the Tunnel Fire. [3] It is also commonly referred to as the Oakland Hills firestorm or the East Bay Hills fire. The fire ultimately killed 25 people and injured 150 others. The 1,520 acres (620 ha) destroyed included 2,843 single-family dwellings and 437 apartment and condominium units.
The fire threat remains critical in Southern California, where thousands of residents were under evacuation orders Wednesday as fire crews battled the out-of-control Hughes Fire near Castaic, a ...
Fires continue to rage across Southern California, with the Hughes Fire exploding to more than 10,000 acres in hours. Critical fire conditions persist across the region, with Fire Weather Warnings ...
The fire spread to 15 acres (6.1 ha; 0.023 sq mi; 0.061 km 2) and destroyed two structures before its forward progress was held by firefighters. [111] The Olivas Fire was reported at 10:44 a.m. PST spreading along the coast of Ventura, Ventura County. The fire grew to 11 acres (4.5 ha; 0.017 sq mi; 0.045 km 2), with one casualty reported.
European Siren for fire detection system. A fire alarm notification appliance is an active fire protection component of a fire alarm system.A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.
California Governor Gavin Newsom and Los Angeles Mayor Karen Bass tour the downtown business district of Pacific Palisades as the Palisades Fire continues to burn on Jan. 8, 2025, in Los Angeles.