You may need to stay with your car for awhile. Keep one of these boxes in each of your vehicles for all emergency situations.
Silver Sol
Ration Bar
Insect Repellant
Fire Starter Cubes
Waterproof Matches
Fire Extinguisher
Shovel
Gorilla Tape
Emergency Blanket
Flashlight
Wound Gel
Work Gloves
Batteries
SAS Survival Handbook
Also include:
List of personal items – sweater, hat, socks, walking shoes, medications, documents, silver coins and cash
Also a Local map + Print a copy of your local area and have it laminated.
Eye Dropper
Cooler
Small Stove
Torch Lighter
Cooking Cup
Tarp
Whistle
Poncho
First Aid Kit
Jumper Cables
Bush Craft Knife
Wind Up Radio
Ax/Saw
Waterproof Blanket
Pre-Packaged Freeze Dried Meal Bucket
Pump Water Filter
Propane Tank
Butane
Water Packets
Toilet Paper
Paracord
Dust mask (n95)
Lantern
Israeli Bandage
Flares
Headlamp
Sanitation Wipes
Basic First Aid Pamphlet
If you are already home and need to get out of your house fast or on the day you run out of food. 
Bug Out Bag >>