1. Why-are-Planos-Tornado-Sirens-Going-Off

    4 Reasons Why the Outdoor Warning System Could be Activated

    Outdoor Warning Sirens are designed to alert people who are outside to seek shelter inside. In hazardous conditions, Plano's sirens will sound for 3 minutes. During monthly tests, Plano's sirens sound for 1 minute, followed by a voice saying "test." Read on...
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