What is a Get Home Bag (GHB)?
A get home bag or a 24hr bag is designed to get you home if disaster strikes and you are away from home. 
Why would I need to a Get Home Bag (GHB)?
When disasters strike basic essentials will rapidly become available. Traffic will quickly become back up as people attempt to flee and you may be forced to walk. When the flooding occurred in Huston, TX for example it took someone I knew 20hrs to drive about 50 miles. Having a few essentials on hand that you can carry with you can save you from a world of hurt.
What disasters should I prepare for?
Here are a few disasters to plan for and again they will also be region specific to where you live and work: 
- Severe weather
- Power grid failure (black-outs)
- Vehicle Break-Down
- Terrorist Attack
- Acts of war or riots
- Bridge collapse
- Tornadoes
- Tsunamis
- Flooding
- Winter storms
What should I have in my get home bag?
Here is my recommend list. You may need some items specific to the region you live in and how far you would have to travel home. Make sure to pick out a bag that will hold all these items and leave some extra room for things like jackets and such during the winter. I recommend staying away from bags that would make you a target such as military bags and bags with certain logos on them. You want to blend in not stand out.

1 Liter of water - I suggest a metal container so you can cook food in it or boil water if needed. 
Energy Bars - I would go with 4-5 high calorie bars. Don't mess with full meals as that extra weight you have to carry. 
Poncho - Being wet is miserable and can even be fatal. Hypothermia will quickly set in if your unable to keep dry and it's cool outside. I personally recommend finding a military version as it has grommets in he corners and can be improvised into a shelter. 
Good pair of walking shows or boots - This is especially important for people who wear dress shoes to work. You want good footwear to protect your feet and allow you to walk home if needed. Don't forget a couple pairs of good socks.
A change of Clothes - You'll want to trade out your three piece suit for something more practical. A good weather practical set of clothes that includes a hat and leather gloves is essential. 
Fire starting tools and prepared tinder - pack a couple of bic lighters as they are dependable and inexpensive. Also make some inexpensive ended out of cotton ball cover in petroleum jelly. Keep them safe and dry inside of an empty pill bottle. Make sure you pack your lighters in a water proof container or zip lock bag. 
Good quality MultiTool - This tool should have a solid knife blade, a saw blade, pliers, flat head and cross point drivers, and wire cutters.  When you need one of these tools, no substitute will quite do the trick.
Head Lamp - pack a hands free good quality headlamp that is water proof. Make sure to pack extra batteries.
First Aid Kit - This kit should include basic first aid supplies such as bandages, gauze pads, medical tape, splint, tweezers, lip balm, moleskin, insect repellant, sunscreen, small mirror, and a variety of basic medications–Tylenol, aspirin, antacids, Dramamine, etc.  If you wear contacts, be sure to include a back-up pair of glasses as well. Make sure to pack a days worth of any prescription medications you take as well. 
Hygeine Kit - this should include hand sanitizer, wash cloth or bandanna, tooth brush and paste, toilet paper, and wet napkins. 
Emergency Blanket - Emergency mylar blankets are cheap, lightweight, and compact.  Not only can they save your life in a cold weather environment, but they can also double as a quickie shelter, waterproof gear cover, and rain poncho.
Face Mask - You'll want to be able to protect yourself from dust, debris, or sickness. Make sure to keep it in a waterproof container or ziplock. 
Self Defense items - disasters are a breeding ground for violent crime,  recommend avoiding conflict but you may be backed into a corner. Based on local laws I would pack at a minimum pepper spray, I prefer bear spray due to further range, and a compact handgun with at least 4 extra magazines. I would try at all cost to avoid hand to hand combat. Make sure you obey local laws and employer restrictions on weapons. Keep it in the car if you have to.
Paper map & Compass - Pack a paper map of the area you live and work in. Make sure to mark on the map locations of your home, friends, hospitals, police departments, and such. I would also highlight a couple of routes home. 
Cash - From buying needed supplies to bribes and distractions cash money is a must.  I would carry small denominations of bills and have them broken into several different packets. Don't show all your cash at once. 
Paper & Pencil - good for taking notes or leaving them. If you get it use water proof paper.
100 FT. of Paracord - 1000s of uses. Enough said.
Emergency Raido - Pick up a small Dynamo hand-crank emergency radio.  Make sure it receives NOAA All Hazard Weather Alerts. I would also get a model with a USB charging attachment, quick way to charge a cell phone.
SCARE Kit - Check out the article on SCARE Kits, I would recommend incorperating some of items in it into this kit.

The weight of my GHB is only 14 lbs.  The items could easily be packed into a smaller bag, but I like the flexibility of more space–especially in cold months when I toss in a heavy fleece, gloves, hat, and shell.

​I leave you with these thoughts. Clearly, there is more to consider than just a bug out bag. Hurricanes, floods, tornadoes, terrorists, wild fires, plagues and foreign invaders will show you no mercy. None of these disasters will pause while you argue about where to go or whether or what to take or leave. Survival is not about absolutes, there is always a risk and the disaster typically has the homefield advantage. The only way to increase your odds of living is to plan and prepare in advance and expect the unexpected. 

You can hear the sirens in the distance. The electricity is out, and your work phone has no dial tone. When you try to use your cell phone, you get the same message over and over: “All circuits are busy.”  You know something catstrophic has happened and you know that waiting this one out is not an option. In the breath-taking stillness, you can hear the clock on the wall. Tick-tock, tick-tock. The eleventh hour is here.