The dry stuff, sure. But how long does an open 2 gallon can of raw eggs last during an emergency when you are without power? I just can't see some of the wet/moist products in that list being safe to eat after about 2 days open without refrigeration.Everything is freeze dried or dehydrated so I don't see a problem keeping it from spoiling. Wheat doesn't go bad. It sits in silos for months at a time. Sugar just needs to stay dry. Same with everything else. Keep the lid on it and keep it dry.
And anyone with any sense knows not to leave stuff out in the sun and heat and weather. I should hope.