If you want to get a good feel about how your elected officials feel about this need take a look at your public buildings. I was at the library the other day and all the doors and windows are now labeled as "shelter in place." They all have kits with plastic and tape, water and what not. The government buildings and schools are taking the same steps. The thought is more to combat an EMP and with that the radiation threat to humans is about 72 hours - hence the 72 hour kit.
My family all have 72 hour back packs in good hiking packs. We also have a good wagon for pulling more equipment. The kits have basic food, first aid and water. They will start out heavy but as we use the kits, the load will lighten. We also have family emergency relocation plans that everyone knows so we aren't dependent on the phone. We are each heading to the same friend's house in Southern VA to join up before heading to my parent's house in the North GA mountains. Those kits are if the need to evacuate the area exists. The 72 hour kits are kept in the trunk of our cars.
For shelter in place situations, we have a year's supply of basic foods and build and rotate that every month. When I make a dinner I purchase the ingredients from the store but put the new cans in the food storage. When the day comes to make the dish, I pull the food items from the front of the shelf. That way I'm always using the oldest can first. DK made me an angled shelf so the cans roll down as I use them. I discovered that my "food saver" sealer can seal Mylar bags so I use those to store my bulk flour, wheat and beans. I also store oatmeal. I haven't brought flour, sugar, or other grains from the grocery store in years. Buying bulk really cuts your prices. The bags are found on line but shop around. The prices can vary a lot.
I'm happy with my emergency food planning. During our recent wedding adventure I didn't have to go shopping - except for milk,eggs and some veggies - for the entire month of Jan. That really gave me a good idea of how much and what type of food we actually use during a month. That's important, store what you use and use what you store.
I do have to admit I feel a little disjunct and left out when everyone else on the block is making those last minute runs to the grocery store before the "big storm." I miss the sense of community.