With most stores getting their deliveries on a daily basis, our supply lines are very vulnerable to interruption. As a resident of the Gulf Coast, I experienced first hand what it is like when the majority fail to plan for such an event. No water, no food, no fuel, no means of communication and no plan. Many stores were cash only; credit cards were worthless. Traffic backed up for miles because very few had alternate routes planned. With the condition of our economy, government bureaucracy, and jobs being scarce, a small event could snowball into something that has nationwide affect.
Most modern-day urban/suburban preppers/survivalist have a G.O.O.D plan (get out of dodge) and a pre-packed bug out bag. Primary and secondary routes mapped and sufficient beans, bullets, and band aids to last a significant time. The large majority,however, will be like sheep with no shepherd, wandering aimlessly waiting for Big Brother to bail them out...again. And when Big Brother fails...again...to show up in a timely manner, those that do have the necessities of life will stand out. Take that into consideration when planning for those types of scenarios.
DON'T STAND OUT! Practice operational security. Stay under the radar. Do not try to be the saviour of the block or your neighborhood. Stay focused, work the plan, and survive to care for your family and those dependent on you.