Homewood Campus Public Safety will conduct a test of the campus siren/public address system and the Johns Hopkins Rave Alert text messaging system at 1 p.m. on Tuesday, Nov. 25. The test will be a ...

Saudi Civil Defence will run a planned test of its emergency-warning systems on Monday, November 3, 2025. Mobile phones across the Kingdom will receive test alerts and fixed sirens will sound in ...

Siren sounds have blared from mobile phones across the country in a test of the national emergency alert system. At around 3pm on Sunday, mobiles connected to 4G and 5G networks vibrated and sounded ...