Here in Florida we are urged every late springtime to prepare for hurricanes and the tornados that follow.  Make arrangements to store valuables, collections, family photos, insurance policies, passports in a secure place. Evacuation or staying in a school/armory/church shelter is usually your best bet, but barring that: 

First, have a plan, a place where all family members know where to meet after the catastrophe hits --as soon as they can get there.  Plan for a strong place to take shelter, i.e. if it is at your home, a room without windows and with strong walls (closet?  bathroom?).  Keeping a 2-week supply of everything to see you through covers a lot of ground - and of storage space.  Find storage for:  medicine for everyone, food that does not need cooking (not rice!) including cereals, canned veggies or meats that need a CAN OPENER or come in baggie-type packages;  and utensils to eat it with; and ways to dispose of not only cans/bottles but also human and pet waste (black trash bags); and plenty of antiseptic methods of removing harmful bacteria.  Remember pet food, water, collar and leash and rabies record.  You need CASH instead of credit cards or checks because without electricity banks cannot open; stores cannot make change --you'll  need the correct change.  Towellette-type supplies/towels/ toilet tissue to keep family as clean as possible; dentifrice and mouthwash; pet food and water.  Gasoline for your electricity generator, because gas pumps don't work without electricity.  Sewing kit; changes of clothes for everyone including diapers and more black trashbags, spray paint to let insurance company know they are needed at your location, (take video NOW of what is in your home now that may need to be replaced), batteries for radio, lighting equipment (candles not the best idea), and fans (for Southern states) there are fans and radios that will run if you shake them --without batteries-- now.  Of course you will need more chlorax than usual, and good soaps/shampoo. Good idea to know someone with a radio transmitter to notify your relatives you are ok, if you are ok.  These suggestions are off the top of my head but YOU can learn LOTS more by contacting hurricane preparation offices, including local red cross or emergency response outfits.Make it a game thinking of things you will need -and can use- at a time of catastrophe; and make the best plan possible for your family facing the worst circumstance.  And don't forget the CAN OPENER!