I actually am not certain if there is a similar large-scale system for "natural disasters [or] nuclear wars". In Santa Barbara (a specific county) we have a way to sign up for that kind of alert run by the "County Office of Emergency Management", but AMBER operates over a much larger arena. Sure, war might sound important, but think of the children!
> The AMBER Alert™ Program is a voluntary partnership between law-enforcement agencies, broadcasters, transportation agencies, and the wireless industry, to activate an urgent bulletin in the most serious child-abduction cases. The goal of an AMBER Alert is to instantly galvanize the entire community to assist in the search for and the safe recovery of the child.
Stuff this sort of system would really be useful for is things like Tsunami warnings. I assume it is use for that where applicable.
I still take issue with the implication my the original comment that it is being misused for this purpose due to some "misunderstanding of scale": people demanded tons of things after Amber, and they got them. Even the sex offender registry was caused as a reaction to Amber (with initial designs for it being parts of bills named after her). The general "zeitgeist" considers "think of the children" much more important than war.
So, this new EAS was being conceived of only a couple years before AMBER, was only really documented a few years ago, and had an implementation deadline of last year. All the FCC's documents on it currently list "such as AMBER Alerts" as either a primary use or an example. The protocol was even modified in 2002 to add an AMBER-specific event code (but if not implemented they use "civil emergency".
> What alerts will WEA deliver?
> Alerts from WEA cover only critical emergency situations. Consumers will receive only three types of alerts:
> Alerts issued by the President > Alerts involving imminent threats to safety or life > Amber Alerts
> Participating carriers may allow subscribers to block all but Presidential alerts.
Does iOS have some ridiculous implementation? Because for Android and SMS users to get horribly inconvenienced by the sound of a text message at 10PM with information about a child abduction sounds quite insensitive. At best.