Oh, and I'm not predicting rioting in the streets, or looting, personally. I'm predicting something that looks more like a rapid slide into the 3rd world. Things will continue functioning, and the infrastructure won't entirely shut down... it will just revert to a rudimentary and primitive state. There will be a mass exodus from the cities as people seek farmland to homestead on, and organized crime will skyrocket in the cities. Lots and lots of people will die, but mostly from preventable diseases and infections. The life expectancy will shorten dramatically as extremes of temperature and lack of medical care do in the weakest elderly. Infant and childhood mortality will increase, and so will the birth rate as contraceptives become unavailable.
Now is a really good time to learn some indispensable skills. Doctors and midwives will be pretty safe.