DEFCON, short for Defense Readiness Condition or simply Defense Condition, is the U.S. military’s ranking system for defense readiness for a potential nuclear attack. The system of ranking the ...

REUTERS The threat level in the region has been upgraded to Level 4, the highest of the US State Department’s four-tier safety ranking system, which warns to “not travel due to crime and ...

A level-5 alert had never been issued for Mount Sakurajima ... remain on the alert for the time being by checking the latest information from the JMA and the local meteorological office.

As the deadly LA wildfires and other major emergencies have shown, alerts rely on a complicated chain of communication between first responders, government administrators, third-party companies and ...