How to start, maintain, and use fire for warmth, water purification, signaling, and morale.
Three Keys to Fire
Preparation matters more than ignition. Spend 80% of your time gathering and sorting fuel before you strike a single spark.
Tinder must be bone-dry and fine. If your tinder isn't right, nothing else will work.
Start tiny. A fire grows from ember → tinder → kindling → fuel. Skip a step and it dies.
1. Why Fire Matters
Fire does five critical things in survival:
Warmth — prevents hypothermia, dries wet clothing
Water purification — boiling is the most reliable purification method
Signaling — smoke is visible for kilometers, fire is visible at night for great distances
Protection — deters most wildlife
Morale — the psychological boost of a fire is enormous. People with fire make better decisions.
2. Preparing Your Fire
Before you try to light anything, gather and sort three categories of fuel:
1. Tinder (catches a spark)
Must be absolutely dry, fine, and fluffy. Size of a baseball to grapefruit-sized bundle. See section 3.
2. Kindling (catches from tinder)
Small sticks, pencil-thickness and thinner. Dead twigs still attached to trees are typically dryer than those on the ground. Gather a double armload — you think you have enough, you don't.
3. Fuel (sustains the fire)
Wrist-thick to arm-thick pieces. Dead standing wood is best. Avoid green wood (it hisses and smokes) and rotting wood (crumbles and smolders). Start with smaller fuel and increase size as the fire grows.
Rule of thumb: Gather three times more fuel than you think you'll need. Then gather more. Running out of fuel at 2 AM in the cold is a serious setback.
Prepare the fire site:
Clear a 1-meter circle down to bare dirt or rock.
If on snow, build a platform of green logs to keep the fire above the waterline.
Shield from wind with rocks, logs, or a dirt mound on the windward side.
Keep your fuel pile upwind and accessible, but far enough from the fire to not ignite accidentally.
3. Tinder Sources
Natural tinder:
Birch bark — burns even when damp due to natural oils. Peel thin strips from dead trees (don't strip live trees).
Dry grass — bundle tightly and fluff the center.
Cedar, juniper, or cypress bark — shred into fine fibers.
Pine resin — the dried sap on pine trees is highly flammable. Scrape it off with a knife.
Fatwood — resin-saturated heartwood found in dead pine stumps. Shave into thin curls. Burns hot and long even when wet.
Cattail fluff — the mature seed heads catch a spark instantly.
Dry fungi — especially bracket fungus on dead birch trees. The underside catches sparks.
Chips or corn chips — oil content makes them burn well
Duct tape — burns slowly, good fire extender
Tampon or cotton pads — pull apart for fluffy dry tinder
Paper, cardboard, currency — in genuine emergency
4. Ignition Methods
Lighter or matches (easiest)
Hold flame under your tinder bundle. Shield from wind with your body. A lighter works in rain if you keep it dry in your pocket. Wet matches can be dried by running them through your hair (the oils help).
Ferro rod / fire steel
Scrape the rod firmly with a knife spine or sharp edge at a 45° angle, directing sparks into the tinder. Hold the rod close to the tinder — don't swing from a distance. The striker should move, not the rod.
Flint and steel
Strike a piece of hard steel (back of knife blade, file) against sharp flint, quartz, or jasper. Catch the spark on char cloth or very fine tinder.
Battery and steel wool
Touch both terminals of a battery (9V works best, but any battery works) to fine steel wool. It ignites instantly. Place it in your tinder bundle immediately.
Fire plow (primitive — difficult)
Rub a hardwood shaft rapidly back and forth in a groove cut in a softwood base. Friction creates a fine dust that eventually ignites. This requires considerable effort and practice.
Bow drill (primitive — effective with practice)
Fireboard: A flat piece of dry, soft wood (cedar, willow, cottonwood). Cut a V-shaped notch to the edge.
Spindle: A straight, dry stick about 2 cm thick and 30 cm long. Same wood or harder.
Bow: A slightly curved branch with cordage tied between the ends (shoelace, paracord, strip of clothing).
Socket: A harder piece of wood or stone with a small depression to hold the top of the spindle.
Wrap the bowstring once around the spindle. Place the spindle in the fireboard notch. Press down with the socket. Saw the bow back and forth rapidly.
Fine, dark dust collects in the notch. When it begins to smoke on its own, tip it onto your tinder bundle and blow gently.
If you carry one extra item in your pack, make it a lighter. Even a cheap disposable lighter gives you thousands of flames and works when wet if kept in a pocket. A second lighter or ferro rod is smart insurance.
5. Fire Structures
Teepee fire (best for starting)
Place your tinder bundle in the center. Lean kindling sticks around it in a cone shape, leaving a gap on the windward side for lighting and airflow. Light the tinder from the windward gap. As kindling catches, add larger sticks in the same teepee pattern.
Log cabin fire (long-lasting)
Stack fuel in alternating layers like a log cabin, with tinder and kindling in the center. Burns steadily and collapses inward, creating a good coal bed.
Long fire (for sleeping beside)
Lay two long, thick logs parallel, about 30 cm apart. Build your fire between them. The logs contain the fire, reflect heat, and the fire burns along their length. Excellent paired with a lean-to shelter.
Star fire (fuel conservation)
Arrange 4–5 long logs in a star pattern with their ends meeting at the center. Light the center. As the ends burn down, push the logs inward. Good when fire fuel is limited.
6. Maintaining a Fire
Feed it regularly. A fire left unattended dies faster than you'd expect.
Maintain the coal bed. Coals keep the fire going if a gust blows out the flames. Push coals together, don't scatter them.
Keep fuel dry. Stack tomorrow's fuel near (not on) today's fire so it dries.
Banking a fire for the night: Push coals together, cover with ash, place a thick green log over the top. In the morning, scrape away ash, add tinder, and blow the coals back to life.
Carrying fire: A smoldering piece of punk wood (soft, rotting wood) or a bundle of slow-burning bark can carry an ember for hours during travel. Keep it sheltered from wind.
7. Fire in Wet Conditions
Making fire in rain is one of the hardest survival skills. Here's how to improve your odds:
Look for dry tinder under overhangs, inside dead standing trees, in bird nests, under dense evergreen canopy.
Dead branches still attached to trees are typically dryer than anything on the ground.
Split wet wood open. The inside is dry. Shave thin curls from the dry interior — these are your kindling.
Use resinous materials. Pine resin, birch bark, and fatwood burn even when damp.
Build a base platform of thick sticks to keep your fire off wet ground.
Start your fire under a natural shelter — a rock overhang, dense tree canopy, or leaning deadfall.
Shield with your body while lighting. Crouch over the tinder, using your torso as a wind and rain break.
Use accelerants if available: hand sanitizer, insect repellent, lip balm — anything petroleum or alcohol-based.
The most common mistake in wet conditions: giving up too early. The first few minutes of a fire in rain are smoky and discouraging. Keep feeding fine, dry material. Once you have a coal bed, rain on top won't easily kill it.
8. Signal Fires
Three fires in a triangle (spaced about 30 meters apart) is the international distress signal.
For smoke: Once your fire is burning well, add green branches, wet leaves, or damp grass. The thick white smoke is visible for kilometers.
For night signaling: Bright flames on high ground. Dry fuel burns brightest.
Keep signal fire materials pre-staged near your fire. If you hear an aircraft, you need smoke within 30 seconds. Prepare bundles of green branches that you can throw on quickly.
9. Fire Safety
Clear a 1-meter circle around your fire. Brush fires can start from a single spark in dry conditions.
Never leave a fire unattended in dry or windy conditions.
Keep water or dirt nearby to control the fire if it spreads.
In snow: build on a platform, or your fire will melt downward and extinguish itself.
Sleep at least 1 meter from the fire. Sparks can ignite synthetic clothing and sleeping bags.
In a shelter: fire goes outside the entrance, not inside. Carbon monoxide kills silently.
Never use fire inside an enclosed shelter. Even a large shelter with a seemingly adequate opening can accumulate lethal carbon monoxide. If you must warm a shelter with fire, use heated rocks instead: warm them in the fire, then move them inside.