This is what Red Cross Suggests at bare minimum:
-At least a 3-day supply of water (one gallon per person per day)
-At least a 3-day supply of non-perishable food
–Flashlight, with extra batteries
-At least a 7-day supply of medications
-Family and emergency contact information
-Extra cash, clothes, shoes, and keys
–Cell phone with charger
–Pet supplies and food
Also, keep your documents (identity proofs, check book, cash etc at hand)