La prova delle sirene nel 2024 è prevista il giorno 7 febbraio tra le 13.30 e le 16.30. E, parallelamente, ogni cantone pubblicherà nell’app Alertswiss una notifica del livello “Informazione”, precisa un comunicato dell’Ufficio federale della protezione della popolazione (UFPP).
La prova annuale delle circa 5’000 sirene presenti in Svizzera avviene il primo mercoledì di febbraio. Alle 13.30 saranno attivate le sirene per l’allarme generale, un suono modulato e regolare della durata di un minuto. Se necessario, la prova sarà ripetuta entro le ore 14.00.
Dalle 14.00 ed entro le 16.30, le sirene a valle di sbarramenti idrici emetteranno il segnale di “Allarme acqua”, dodici suoni continui e gravi in sequenze di venti secondi a intervalli di dieci secondi. Sarà testata pure l’app “Alertswiss”: ogni cantone pubblicherà infatti una notifica del livello “Informazione”. Gli smartphone non emetteranno quindi il suono delle sirene, come accadrebbe invece per le notifiche “Allarme”.
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