There are a few items that most families should try to do in order to be prepared for events out of our control.
Keep your gas tanks full. If you are below half a tank, fill your tank. This is sometimes a hassle, but we have seen times when gas stations run out of gas or an event happens and you cannot make it to a gas station. What if you are stuck on the highway in traffic? The solace in having a full tank when you need to get home cannot be understated. I know a guy who installed a hundred gallon tank in his dodge 5.9 Cummings. Grant it is expensive to fill, but if he needed to leave or get back to his family, he would be better off than most people who coast on fumes.
Make a rally point when you are at an event. The Boston marathon and other tragedies should teach you this. When disaster strikes, the phone lines can become engaged and you may not be able to reach your family. A clear defined RP may save your family.
Carry supplies in your car. Water, weapon, fire and food. Last year we were driving back from Texas and his a blizzard that was not expected to be as bad. We counted over 50 cars that were stranded on the road. The police and wreckers stopped responding and people were stuck overnight. Power was out for 100 miles and it was a very scary notion for my wife to be stuck in this. Luckily, I filled the tank, had a gallon of water, one MRE, a pistol with spare mags and ammo. Things I did not have were a winter coat and boots. If we had of gotten stuck, then I would have been in trouble. Lesson learned. Fifty percent prepared is not prepared.