[TheChosen]

You can check how it went in Iceland few months ago.

You can also take a look how things went on with Katrina (they send out the army, gather people at a central location and provide food rations ... I believe it was some stadium with Katrina). Only this time it will be the already prepared FEMA camps.

It greatly depends on which country you are talking about. USA & UK in my opinion are the countries that are least able to cope with any kind of breakdown... while third world countries are used to growing their own food and getting by without much money or modern tools and are much less dependent on the banks.