What's up, doc? Food is needed to feed those hungry survivors. You'll need them to transition from night to day, so it's important to ensure you're always well-stocked. You can complete missions that reward food to keep those larders topped up.
If you want to increase the amount of food you can hold, you can build a food storage trough from the housing option from the build menu, in the bottom left-hand corner of the screen on the city screen.
You can also channel your inner-farmer and grow your own Food in your City! Plants can be built and produce 4 food in 3 days. Let's focus on raiding for weapons and survivors!
Don't let your survivors starve! If you don't have enough food at the start of the day, one of your survivors could starve, putting him into a recovery state for a few days. This will happen at the start of every day so if you are low on food, you might lose more and more survivors which will lead to a quick "game over".