Air-raid siren sounds the warning. Air-raid sirens first sounded the warning in London in September 1939. They became an almost daily part of life in the capital a year later during the height of ...

When activated, sirens will sound for 3-5 minutes and repeat every 10-15 minutes while a warning is active. They do not sound continuously or issue an "all clear" alert when a warning expires.

Winter Haven residents at the city's recreational facilities Thursday might hear sirens go off multiple times, but there's no reason for alarm. The City of Winter Haven in collaboration with the ...

Jan. 27—LIMA — Nutrien's Lima Nitrogen facility in Shawnee Township will be sounding its outdoor siren and alert system during an emergency training exercise at 9 a.m. Thursday, Jan.

Millions of mobile phones will let off a loud 10-second siren ... The sound and vibration will last for about 10 seconds. Approximately 4.5 million people will receive the Emergency Alert in ...

Hawaii will conduct its monthly outdoor warning siren and Emergency Alert System test on February 3 at 11:45 a.m.