If you are new in the Netherlands and you are wondering what just happend – Well that was the monthly Monday siren.
The Netherlands tests its air-raid sirens once a month, every first Monday at noon, to keep the public aware of the system. This happens everywhere around the Netherlands and it is a reminder that in case of emergency, the alarm will go on.
So, if you hear this sound midday on the first Monday of the month don’t panic. If it is in any other monent…don’t panic. Just to go inside, shut all doors and windows and turn on your tv or radio for updates.
If you want to be prepared in every moment, here an english downloadable PDF with handy information on what to do in various kinds of emergencies.