I don’t have high blood pressure, but am extremely salt sensitive. If I eat a Chinese meal (which I love!), I have to remember to take a couple of potassium tablets afterward, or I will puff up and look like I’ve been on a bender for the last two days! Swollen eyelids, fingers and even toes. Something not working well with my kidneys? Maybe. Hasn’t shown up in any blood work, and the potassium does the trick. So, we have to figure our own bodies out. Let’s be glad we all don’t have to fool around to do that! Good health is a blessing.
This brings us to the "how". In most cases, the absolute minimum water intake is somewhere around one quart per person per day; but note that this assumes no weather extremes, no substantial exertion, and no immediate hygiene needs. When these assumptions hold true, storing about 1.5 to 2 gallons per household member - enough for perhaps up to a week - should provide a viable if modest buffer for short-term emergencies. Store-bought gallon jugs are pretty cheap, hassle-free, and easy to squeeze in just about anywhere; if you keep them away from sunlight and heat, they should last 5+ years before needing to be rotated or thrown out. Don't try to save a buck by reusing milk or juice jugs, though: they are almost impossible to clean properly and may end up supporting bacterial growth.
Now, there are some dangers to life and limb that we simply can't predict or prevent: the occasional falling piano, the murderous roommate, the untimely stroke. Then there are the risks we take willingly, accepting the inherent and unavoidable trade-offs of our hobbies or jobs: the possibility of being snatched by a giant squid while snorkeling off the coast of California, or the near-certainty of lung fibrosis from toiling in a sugar mine. These are the things we can't or don't want to give up - and that's perfectly fine.
But to summarize, let's start with the eponymous threat of nuclear war. A typical ICBM strike is likely to kill most people within a 1 to 10 mile radius of the explosion, with most perishing due to the blast wave and intense heat, not gamma rays. In fact, as witnessed in Hiroshima and Nagasaki, when one sees a flash of light, ducking behind cover is quite likely to save their life. But more importantly, even an "all out" nuclear exchange with another superpower would leave most of the United States unscathed. It would also not turn the planet into a post-apocalyptic wasteland - at least not any more than the hundreds of nuclear tests already conducted in the twentieth century.
There's 1 small thing and 1 large thing that, for me, saved it from being a 1 star. First the small thing, the mention of herbs and spices - I think this may be an item that many people forget about, but can make a poor situation go from "surviving" to "doing good". Secondly, the section on entertainment and education - I think this is an oft-overlooked aspect that will actually be very important, and again will affect whether one just survives or thrives.
Clothing: There’s a reason why characters in military movies refer to socks so often — they’re critically important and often overlooked. We love Darn Tough socks because they’re wool and a lot more durable than other brands like Smartwool. Grab a boonie hat, too; they’re easy to throw in your bag and provide better protection than most other options.
Food supplies in a bug-out vehicle include hundreds of pounds of wheat, rice, and beans, and enough honey, powdered milk, canned goods, bottled fruit, vitamins, dehydrated fruits and vegetables, salt, pepper, spices, and oil for several months. In addition, the kits often contain high-calorie energy bars, a cooking kit, utensils, liquid soap, and towels. The water supplies may include bottled water, filtering kit, bottles, collapsible water containers, and chlorine bleach for water purification. Food preparation and washing equipment may include items such as a grain grinder, a bread mixer, a strainer, a manual can opener, a steam canner with canning jars and O-rings, cutlery, knives, an electric 12-volt cooler icebox, kerosene lamps and heaters, kerosene or propane stoves, extra fuel, a clothes wringer, a foot-operated treadle sewing machine, and an electric hot plate (which would require an inverter to operate off a car battery).
Survival kits, in a variety of sizes, contain supplies and tools to provide a survivor with basic shelter against the elements, help him or her to keep warm, meet basic health and first aid needs, provide food and water, signal to rescuers, and assist in finding the way back to help. Supplies in a survival kit normally contain a knife (often a Swiss army knife or a multi-tool), matches, tinder, first aid kit, bandana, fish hooks, sewing kit, and a flashlight.