There is no "all-clear" siren to signal when the warning is over. Tornado siren tests will go on as planned in various Greater Cincinnati counties Wednesday after the region saw severe weather ...

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

We’re seeing if there was a false radio signal that triggered that activation so that we can fix moving forward." Siren malfunctions do not occur often, and Simon said that there hasn't been a ...

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 ...

In 2022, the sirens market is anticipated to reach a valuation of USD 170.1 Million. By 2032, the sirens market is ...

The sound of the 'warning' signal and the 'all clear' would become very familiar to people living in large cities in Britain. Air raid sirens were placed on the top of tall buildings - often ...