A BOB (bug out bag) or GHB (get home bag) is a cornerstone of preparedness, because when an emergency occurs there is little warning.
I am not or claim to be a medically trained person doctor or Indian chief, I advise a first aid to a EMT level group of classes and to inform yourself online, remembering your legally responsible in some cases and should send a cold chill only a doctor or Nurse practitioner (specific) can give/ administer/ / prescribe medications EMERGENCY means a world of incalculable extremes that even the best equipped fire and emergency agencies must use other means to extract a injured person, remember that.
Recent mudslides,earthquakes, hurricanes and tornadoes or how about an accident on the road ? in an instant your a on scene first responder or need to sustain life of your own family members even yourself until a emergency response can be on site.
The misnomer that the world is going to end is not just a recent event, BUT the world for some ends everyday and sometimes because they or a on site responder did not have the basic first aid knowledge or first aid kit enhanced with some very basic cheap items.
Water is number 1, A stainless steel bottle/s of at least one quart, remembering never give water to unconscious or injured just dampen lips pat face it they are hot. an easy way to cool is to take towel wet and whip in a swinging motion in the air will cool a great deal.
Stem bleeding #2 Stem is not stop and sometimes all you can do is slow it to a trickle, never remove a dressing add over retain pressure with a wide strap like a luggage strap with a cinch for smaller areas gauze, athletic tape and box of kotex a few Ace bandages in addition to a basic first aid kit and a Swiss army knife not a Chinese knockoff because this last a lifetime
Warmth or shade of a blanket is 3 always have a real blanket like a fleece throw and a couple of space / emergency blankets remember not to move a person although they may look fine internal or unseen injuries may cripple or kill in dire emergencies / fire etc. you may have no choice
splinting / immobilizing Paint stir sticks are about as cheap and easy to carry and use as anything I could imagine other than simple newspaper or magazine.try not to move the injured limb, splint or secure to the body in place, 550 paracord is useful as well.
Other purposes of our "bag" is also personal comfort and that includes food drink to suit the climate you can buy MRE heaters you can also have cold packs that when the pouch within the bag is broken it turns almost to ice key areas to cool someone from a raging fever or heatstroke is to lower the bodies temp as fast as you can placing a cold pack under the armpits neck at the carotid area and even the crotch. wetting the body with alcohol is quick but water and fanning is good in summer shade is needed o keep from reheating.
Weather appropriate clothing in winter your swimming trunks ain't going to make it. a full Tyvek suit from Homedepot is cheap wind and waterproof tiny when folded and disposable get it in a larger size to cover all of you with your winter clothing consider snow shoes or ice cleats/ crampons as falling or slipping is going to wear you out time and distance has killed more people from not being able to get to safety. snow chains ? if you need them only once they are well worth it.
If you live where there are mountains hills and gullies a rope like Kernmantle 9MM or 10MM climbing rope 3 or 4 "real" weight bearing caribiners look for used on EBAY as this is pricey new and you may never need it but it makes a good tow rope in fact a few tow straps connected with Caribiners could work. even if you can't another person on site might be able to use the equipment and if that is all we can do is be to help we have done more than 10 people goggling although calling 911 is the very first thing to do.
My BOB or GHB may have other items specific to my experience needs or training / knowledge as should yours not all of this need to be expensive, rummage through garage sales thrift and resale shops a back pack and all the items won't cost that much.
THE END OF THE WORLD, Ask anyone that has survived any catastrophic weather or natural disaster event fire or bridge collapse ? bridge failures 2000 to present Bridges connect water isolated or impassable areas to livable drivable land imagine a winter like this and or a heatwave and your stuck in traffic for a plain accident I have been for many hours do you have enough fuel to run your precious AC or heat do you have a gas can so if there is a station you can go get some ? do you have cash in case the ATM's don't work ? do you have spare key hidden in case you lock yourself out of your vehicle in a crisis as can happen when your preoccupied ? only stupid people think they will never die or get injured or sick of for that matter get in a jam. People with their feet on the ground and w/ common sense choose to mitigate and be prepared mentally and with the basic items.
Why a BOB or GHB because it is being physically responsible for yourself family and unfortunate souls in mortal danger who may be too stupid to have thought for anyone else including themselves