S. Heisley wrote:Not even hot water?
Okay, so, no answer is a "No" answer. I have trouble imagining not having a nice hot cup of black coffee in the morning; but, to each his own.
If you drink coffee, you can look around for ready-made coffees in individual cans or bottles and drink it at the ambient temperature. Or, just add some instant to some room temperature(?) water. (...been there, done that...not so nice.) Oh, and tea, 'sun tea', doesn't need hot water or even sun to become tea.
Toast your bread at home, before you leave on your trip and it will usually give it a little more stability to hold it together better when traveling and remove some of the moisture so that it is less likely to get moldy. I like to put each two toasted slices in a separate sandwich bag to further prevent crumbling or contamination such as mold.
For breakfast, slap a piece of that bread or toasted bread on a paper plate and swipe some peanut butter on it. Then, cover that with some apple sauce and eat the treat with a knife and fork.
For peanut butter, JIF makes individual servings in small plastic containers. Just peel the lid off to use.
For apple sauce, MOTTS makes a nice selection of individual servings in 1/2 cup plastic containers. Again, just peel the lid off to use. They make flavor mixes like cinnamon, berries, strawberry, and mango. They are all pretty good.
Other breakfast ideas (although they won't give you much protein) are granola bars or other breakfast bars or muffins or dry cereal.
For lunch, you can eat trail mix or fruit, such as apples, with either jerky or nuts or wipe peanut butter on apple slices.
Or, make yourself a sandwich with canned meat and mustard or mayonnaise. (You can get small jars of mayonnaise that will last several days without refrigeration....The vinegar in it protects it.)
I like to take a raw white potato, washed, and slice it and sprinkle it with salt and think that tastes pretty good. Raw potatoes should not be refrigerated.
For dinner, without a way to boil water, you're going to be limited to things similar to lunch (above) or cold canned meals described previously by others. If you're lucky enough to catch a fish or a rabbit, you could roast that over a fire; but, if you plan on that, Murphy's law may take over.

If you have a fire, you can wrap potatoes or corn on the cob in aluminum foil and bury them in the hot coals to cook.
Clean carrots and celery sticks at home, before you leave, and store them, covered in water, in a closed top jar and they last 3 or 4 days that way. They are plants and react like a cut flower. A cut flower will last close to a week if the water is changed regularly. For dessert, open a can of peaches or pears or fruit cocktail and chow down on that. Or, packaged cookies, etc.
For now, that's what I can think of. I don't understand not taking anything to cook with, though. I took a camping trip to Washington state via Amtrak and was able to take a foot locker containing a tent, two sleeping bags, food, a one burner white gas stove with a small container of white gas for refills and we slept and ate very well.
Good luck.