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There are numerous sirens throughout the city. When activated, the sirens emit a loud wailing noise that goes up and down for three minutes.
Individuals who hear the sirens while outdoors should seek immediate indoor shelter inside a sturdy building away from windows and glass.
When the threat has passed, the siren will emit a steady wailing signal for three minutes.
The city conducts a 20-second test tone the first Tuesday of every month at 10 a.m. The test tone level is at lower pitch volume than the actual alert sound.
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