Hopefully the rainbow-colored-like Homeland Security Advisory System might be soon changed to two level of warnings – elevated and imminent and they will have an expiration date.
The new systems is expected to replace the color coded one by April 27.
Surprisingly our government decides to use social media for alert broadcasting. New alerts would be published online using Facebook and Twitter after federal, state and local authorities are notified.
According to the draft plan, an “elevated” alert would warn of a credible threat against the U.S. It probably would not specify timing or targets, but it could reveal terrorist trends that intelligence officials believe should be shared in order to prevent an attack. That alert would expire after no more than 30 days but could be extended.
An “imminent” alert would warn about a credible, specific and impending terrorist threat or an on-going attack against the U.S. That alert would expire after no more than seven days, though it, too, could be extended.
Source: Cnet