Now it is very easy to build your own siren sound alarm, small enough to be carried in a garment pocket. This powerful audio-visual alert device is realized using the renowned Arduino platform. The 9V ...

As we approach the six-month anniversary of the May 16 storm, St. Louis City’s tornado alarm system remains troubled.

Deaf and hard-of-hearing St. Paul residents and their families are getting some peace of mind from a new program that offers a "visual smoke alarm" with a piercing siren and a strobe light. Deaf and ...

Estonia's emergency siren network will be tested again on Tuesday afternoon to see how recent improvements work. However, there will be no sound used. Earlier this year, the first nationwide test of ...

A Honolulu police training exercise “mistakenly activated” emergency warning sirens at 5:05 p.m. today on Oahu and Maui. The sirens were heard mostly on Oahu from Kailua, Kakaako and Waikiki to as far ...