...you could not buy food or supplies for over a week?
...you had to take shelter (shelter-in-place) for several days with no means to get additional supplies?
...you were asked to keep away from other people to keep germs from spreading?
Water
Bottled Water. One gallon, per person, per day, for drinking and sanitation. Keep the water in a cool, dark place and change to a fresh supply every six months.
Food
Nonperishable food. A supply of 3-5 days of food per person. Ready to eat canned meat, fruit, and vegetables.
-Canned or boxed juices
-Powdered milk and soup
-Crackers, granola, trail mix
Clothes Collect one change of clothes and footwear per person. Consider packing blankets, rain gear, and outerwear in case of inclement weather.
Medications Collect three days worth of any prescription medicines you're taking. Be sure to note the expiration date so you do not keep them past their date.
Flashlight Keep a bright flashlight in case there is no electric power. Consider getting a lantern-style light for hands-free use. Do not use candles! They're a fire hazard and are easy to lose track of when the lights come back on.
Can opener Make sure it's a manual can opener in case there's no electric power. Consider buying items with a pull-top opening. You won't need a can opener at all!
Radio A battery-powered radio for listening to news and weather. Consider purchasing a crank-operated or solar-powered radio. Don't forget extra batteries! Buy them in advance in case they're in short supply.
Hygiene Items Just the basics like soap, toilet paper, and a toothbrush. Moist towelettes can be useful for quick sanitation.
First Aid Basics such as antiseptic, gloves, bandages, and non-prescription medicines. You can buy a pre-made kit at most pharmacies or grocery stores.