For the car

Water: A three-day supply amounting to 1 gallon per person per day.

Food: A three-day supply, about 1,000 calories — something lightweight like energy bars

Water purification tablets, or a water filter in case you go beyond three days and need to find alternative sources of water.

Portable radio

Flashlight and/or light stick Charger for cell phones and devices, powered by batteries, along with a cell phone charger cord for the car Batteries

Blankets: Emergency survival models are compact and light

Tube tent