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I'm not so sure about always "stay indoors" part - in particular in case the dams leak and half of the country is about to be under water. I guess depends on t

• jacquesm 7y ago
  Those are pretty far down on the likelihood scale, though we have had instances of that, especially near river dikes in the last couple of years. We do not have a lot of dams here. The more likely cause for such an alarm is chemical pollution from either an accidental release or a fire. Their old use was for air raids but those are even more unlikely (at the moment, of course this can change).
• sverhagen 7y ago
  The actual instruction from the government is: * Go inside * Close doors and windows * Listen to the emergency channel * Know when it is safe to go outside again Sirens are sunsetting, but still operational until 2020.