Silesian siren drill on 21 October: RCB notice
RCB scheduled a 9:30–11:00 exercise in Częstochowa and five counties. Here is the area covered by the notice.
Poland’s Government Centre for Security announced a siren exercise for 21 October 2026, with a scheduled window of 9:30–11:00.
Where the exercise was scheduled
The notice covers Częstochowa and the counties of Częstochowa, Kłobuck, Lubliniec, Myszków and Zawiercie. RCB identified the signals as part of a drill and asked residents to remain calm.
Reading the alert correctly
The location and time matter: this notice should not automatically be applied to other alarms. Check the date and official instructions in any subsequent message. An exercise announcement is not a report confirming how the drill proceeded.
The exercise window and an individual siren signal
The interval from 9:30 am to 11 am lasts 90 minutes. That is our calculation of the window given by RCB, not a statement that every siren was to sound continuously for an hour and a half. The notice specifies an area and exercise window rather than a timetable for every device.
Identifying this particular message requires three details together: the date of 21 October, the named city or county, and the exercise label. Removing one when sharing the notice makes it harder to distinguish an archived announcement from a later warning.
Responsible editor: Mircea Mihai Adrian
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