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Übung für den Ernstfall: Wo am bundesweiten Warntag im Altkreis die Sirenen heulen
Wenn am Donnerstag um 11 Uhr die Sirenen aufheulen, besteht keine Gefahr. Behörden testen bundesweit die Warnsysteme. Im Kreis Böblingen bleibt es vielerorts ruhig – denn es gibt hier kaum fest installierte Sirenen.

Eine Alarmsirene auf einem Hausdach: In vielen Kommunen gibt es sie nicht mehr, andere wollen wieder welche installieren. Damit eventuelle Warnungen auch jeden Haushalt erreichen.
dpa