Even the CDC recommends you keep an emergency go bag with some food, water, important documents and other basics. You should also keep your home stocked with a few days of food and water, decent medical supplies you are able to use, and whatever else you need for your situation.

Zombies is unlikely, bad weather or a forest fire however...

I had a family member who was within 2 miles of forest fire - no ready bag, no extra supplies, nothing. "Well, I can just stop by the store if I need to evacuate right?"