The federal government tested its emergency alert system by sending messages to cellphones, TVs and radios. FEMA said it went well.

FEMA and the FCC launched a nationwide test of the emergency alert system on Wednesday.

As fears mount over the potential of WW3, the UK will test its emergency alarm system for the first time in two years.

Hennepin County Emerge says a computer software problem caused 292 emergency sirens to unexpectedly blare less than an hour after a scheduled test Wednesday.

What will the emergency alert test message say? All across the United States, broadcast TV shows and radio will be interrupted as the emergency message goes out.