Loaʻa i kahi ahi ahi i ka wā e hele wāwae ana a i ʻole ka backpacking¶

ʻO ka ʻike ʻana i ka uahi pyrocumulus kiʻekiʻe, ka ʻala ʻana i nā nila paina e ʻā ana, a i ʻole ka lohe ʻana i ka leo o ke ahi lei aliʻi e piʻi ana i kahi canyon ʻoiai ʻoe he mau mile mai ke alahele he pilikia ola a make paha. ʻO nā ahi ahi i alakaʻi ʻia e nā makani canyon a me nā kiʻekiʻe kiʻekiʻe e holo mau ana ma 10 a 25 mau kilomita i kēlā me kēia hola (6 a 15 mau mile i kēlā me kēia hola) ma ka ululāʻau a hiki i 35 kilomita i kēlā me kēia hola (22 mau mile i kēlā me kēia hola) ma waena o ka mauʻu maloʻo, ʻoi aku ka wikiwiki ma mua o ka holo ʻana o ke kanaka me ka pūʻolo a ʻole. Loaʻa ka hapa nui o nā mea make ma muli o ka makaʻu a hoʻāʻo e holo piʻi ma mua o ke ahi a i ʻole e paʻa ʻia i loko o nā "chimneys" haiki kahi e hiki ai nā kinoea convective wela nui i 800 degere Celsius (1,472 degere Fahrenheit). No ke ola ʻana i ke ahi ahi ma hope, pono e heluhelu koke i ka makani a me ka slope physics, e neʻe ma hope (e kū pono ana i ke ala o ke ahi) a iho i lalo, e kuʻi ma kahi ʻaoʻao haʻahaʻa i loko o ka wahi palekana "ʻeleʻele" i puhi ʻia, e hoʻoheheʻe i nā lole synthetic, a me ka hoʻomākaukau ʻana i kahi kahua hoʻomaha wela wela i ka wā ma luna o ka lepo.

E hana i kēia i kēia manawa¶

1. E ho'ā i kāu uila SOS beacon a kāhea koke aku i nā lawelawe pilikia me kāu mau kikoʻī GPS pololei. E kaomi i ke pihi SOS ma kāu Garmin inReach, Zoleo, ACR Personal Locator Beacon (PLB), a i ʻole Apple Emergency SOS ma o ka Satellite, a kelepona i kou wahi. helu pilikia (911 ma ʻAmelika Hui Pū ʻIa a me Kanada, 112 ma waena o ʻEulopa, 999 ma United Kingdom, 000 ma Australia). E haʻi i kāu latitu/longitude pololei, ke kiʻekiʻe, ka inoa o ke ala, ka nui o ka hui, a me ke ala āu e neʻe nei no laila ʻike nā mokulele mākaʻikaʻi ahi a me nā hui helitack aia nā kānaka ma ka ʻāina ma ia māhele.
2. Mai ho'āʻo e holo ma mua o ke ahi i uka a i ʻole ka ʻauwai haiki. Piʻi ke ahi a hiki i ka 16 manawa ʻoi aku ka wikiwiki ma mua o ka neʻe ʻana i lalo no ka mea, ʻo ka piʻi ʻana o ka wela convective e hoʻomaʻamaʻa mua a maloʻo i nā mea kanu ma luna o laila, a ʻo nā canyons like V-like, nā awāwa, a me nā noho hoʻoheheʻe e lilo i mau kapuahi puhi. E neʻe i lalo a ma hope (ma kahi kihi 90-degere ma ka makani) mai ke "Head" (ke alo) o ke ahi.
3. ** E poʻo no ka "The Black" (ʻeleʻele i ʻā mua ʻia) inā hiki ke komo.** Ma ka ʻoihana ahi ahi ahi (United States Forest Service a me NWCG aʻoaʻo), ʻo ka wahi palekana ma kahi ahi ahi ma "The Black" no ka mea i ka wā i pau ai nā mauʻu āpau a me nā pulupulu i ke ahi, ʻaʻole hiki i ke ahi ke ʻā i kēlā ʻāina i ka lua o ka manawa. Inā kokoke ʻoe i ka hope anuanu a i ʻole ka ʻaoʻao haʻahaʻa haʻahaʻa o ke ahi ma lalo o 0.6 a 0.9 mika (2 a 3 kapuaʻi) ke kiʻekiʻe, e holo ma ka ʻaoʻao o ka lapalapa ahi i loko o ka ʻāpana lehu ʻeleʻele maloʻo a hoʻoneʻe i nā snags make e kū ana.
4. E hoʻolei i kāu ʻeke ʻeke kaumaha a wehe i nā ʻāpana o waho o ka polyester synthetic, nylon, a me ka hulu hipa inā kokoke mai ka hoʻopaʻa ʻana. Inā pono ʻoe e holo holo no kou ola a i ʻole e ola i ka wela wela, e hoʻolei koke i kāu ʻeke kaumaha (mālama wale i kāu mau hue wai, SOS satellite, nā ʻāpana huluhulu/ulu, a me ka ipu hao/trowel). ʻO ka polypropylene, ka huluhulu polyester, a me nā pūpū nylon ultralight ** hoʻoheheʻe ʻia ma 160 a 250 degere Celsius (320 a 480 degere Fahrenheit)** mai ka wela wela wale nō, e hui pū ana i loko o ke ahi hohonu ʻekolu me ka ʻole o ke ahi e hoʻopā iā ʻoe. E hoʻohana 100% hulu hipa, 100% pulupulu (denim), a i ʻole ʻili.
5. E ʻimi i kahi ākea a me ka wahie ʻole Survival Deployment Zone (rock slide, scree field, gravel bar, or mala) inā ʻaʻole hiki iā ʻoe ke pakele. Inā ʻoki ke ahi i nā ala pakele a pau, e neʻe koke i kahi nui loa me zero a i ʻole ka liʻiliʻi loa o nā mea kanu hiki ke puhi ʻia: kahi māla pōhaku nui a i ʻole slope, kahi alanui lepo ākea, kahi kahawai wai pāpaʻu a i ʻole kahi kahawai wai pāpaʻu. E hoʻomaʻemaʻe i nā nila maloʻo a pau, nā lau, a me ka pulupulu ʻana i lalo i ka ** ʻāina mineral** ma kahi liʻiliʻi he 3-a-6-mika (10-a-20-kapuai) a puni ʻoe.
6. E moe i lalo me kou ihu a me kou waha i kaomi ʻia i loko o ka lepo maʻemaʻe a i ʻole ka pulupulu pulu pulupulu i ka hala ʻana o ke ahi. Mai kū i luna a holo i ka wā e ʻalo ai ka lapalapa ahi nui i mua a me ka nalu uahi wela loa ma luna o kou hoʻomaʻemaʻe ʻana: hoʻokahi hanu o ka ea wela loa ma ka ʻili o ka maka (300+ degere Celsius / 572+ degere Fahrenheit e hoʻopōmaikaʻi i kou ea) E moe palahalaha loa ma ka lepo olohelohe (a i ole ia i lalo i kou a-i i ke kahawai laula me ka pulupulu pulu pulupulu ma kou poo), e eli i auwaha uuku no kou alo e hanu ai i ka ea maalili he 15 kenimika (6 iniha) e pili ana i ka lepo, a noho ilalo a hala ka nalu wela nui.

flowchart TD
    A["E ʻike i ka uahi ahi, nā lapalapa, a i ʻole ka ua ember ma ke ala"] --> B["Trigger Satellite SOS / Call 911-112-999-000 me nā kikoʻī GPS pololei a me ke kuhikuhi o ka huakaʻi"]
    B --> C{"E loiloi i ke kūlana ahi, ka makani makani, a me ke kiʻekiʻe"}
    C -->|"Aia ke ahi ma lalo ou i loko o kahi awāwa a i ʻole e piʻi ana i luna ou"| D["MAI piʻi i uka a i ʻole i nā noho lio; e hele ma ka ʻaoʻao (90 deg i ka makani) a iho i loko o ka lua wai kūʻē"]
    C -->|"Ma kahi kokoke i ka ʻaoʻao hope a i ʻole ka ʻaoʻao haʻahaʻa haʻahaʻa (< 0.9 m / 3 kapuaʻi ke ahi)"| E["E ʻaʻa koke i kahi āpau lahilahi ma ka ʻaoʻao i loko o 'The Black' (wahi i puhi ʻia)"]
    D --> F{"Hiki iā ʻoe ke hōʻea i ke alahele, ke alanui paʻa, a i ʻole 'The Black' ma mua o ke ahi?"}
    F -->|"ʻAe"| G["E hoʻokuʻu i nā mea koʻikoʻi inā pono, mālama i ka wai a me ka SOS, e neʻe i ka makani keʻa ma Sparse Fuel (pōhaku, mauʻu pōkole)"]
    F -->|"ʻAʻole (Entrapment imminent)"| H["E koho i ka ʻĀina Ola: ʻAlaʻa talus/scree mala pōhaku, ʻiliili kahawai, kahawai ākea/loko, a i ʻole ka hoʻomaʻemaʻe ʻāina minerala."]
    H --> I["Wehe i nā lole naylon/polyester synthetic a pau i nā pahu wahie a hoʻopaʻa i 20 m ka mamao"]
    I --> J["E ʻohi i ka lepo mineral, e moe i lalo me ka hanu ʻana i loko o ka ʻeke lepo ma ka pulupulu pulupulu a hala mua"]

Māhele 1: Hoʻomaopopo i ka physics ahi ahi ma ka ʻāina mauna a me ka nahele¶

Hiki i ka mea hele kua'āina ke hoʻomaopopo i ka pili ʻana o ke ahi me Topography, Fuel, and Wind hiki ke wānana i kahi e wikiwiki ai ke ahi ahi a ma kahi e kū ai, e pale ana i nā pahele ʻāina pololei i pepehi i nā mea holo leʻaleʻa a me nā mea puhi ahi.

ʻO nā kānāwai ʻāina a me ka makani 4 o ka hana ahi ahi¶

Phase 2: Escape route geometry and crossing into "The Black"¶

Wildland firefighters never enter a fire zone without establishing LCES (Lookouts, Communications, Escape Routes, and Safety Zones). If you smell smoke or see a plume while hiking, stop for 30 seconds to map the fire's anatomy before running blindly.

Anatomy of a wildfire and how to escape it¶

Every wind- or slope-driven wildfire has four distinct parts:

1. The Head: The downwind / upslope leading edge of the fire where flames are tallest, heat is most lethal, smoke is thickest, and spread is fastest. Never position yourself directly in front of the Head of a wildfire.
2. The Flanks: The left and right sides of the fire, parallel to the wind direction. Flame heights on the flanks are much lower and move slowly outward.
3. The Rear (Heel): The upwind / downslope back edge of the fire, which creeps slowly against the wind with low flames.
4. Spot Fires: New fires ignited 0.5 to 3 kilometers (0.3 to 2 miles) ahead of the main fire by windborne glowing embers (firebrands). Spot fires are dangerous because they can ignite behind you on your trail and pinch you between two fire fronts.

========================================================================
WILDFIRE ESCAPE GEOMETRY (WIND OR SLOPE MOVING SOUTH TO NORTH)
========================================================================
                     [ SPOT FIRES (Embers) ]
                              ^
              DANGER ZONE     |  (NEVER RUN HERE)
                         \====^====/
                        / THE HEAD  \  <-- Fastest, hottest flames
       Move Laterally  |             |  Move Laterally
     <--- (90 Degrees) | Left  Right | (90 Degrees) --->
                       | Flank Flank |
                        \           /
                         |   "THE   |  <-- SAFE ZONE: Already burned
                         |  BLACK"  |      bare ground inside perimeter
                          \________/
                          THE REAR
========================================================================

How and when to punch through into "The Black"¶

To an untrained hiker, running toward the fire line to cross into the burned area sounds insane. Yet in wildland firefighting history, crossing into "The Black" has saved hundreds of lives while running away from the fire in unburned brush ("The Green") has proven fatal.

• Why "The Black" is safe: Once grass, sagebrush, or forest understory has burned off, there is no ground fuel left to burn. Even if the main fire front rages 100 meters away in "The Green," a person standing inside a wide expanse of "The Black" is completely safe from being overrun.
• When you CAN cross into The Black: In light-to-medium fuels (grasslands, open shrublands, oak woodland, or open pine forest without heavy downed logs) along the Rear or a quiet Flank of the fire where flame heights are under 0.6 to 0.9 meters (2 to 3 feet) and the active flaming zone is only 1 to 3 meters (3 to 10 feet) deep:
• Ditch your backpack and synthetic jacket.
• Pour water from your bottles over your wool/cotton clothing, hair, and a cotton bandana tied over your nose and mouth.
• Shield your face and eyes with your gloved or covered forearms, hold your breath for the 3-second dash, and step briskly through a low gap in the flames onto the burned black ground.
• Walk 30 to 50 meters (100 to 165 feet) deep into the black until the ground feels cool and radiant heat from the unburned green edge diminishes.
• Hazards to watch for inside "The Black":
• Falling "Widowmaker" Snags: Burned standing trees and hollowed-out roots collapse without warning after a fire passes. Stand in a clearing inside the black well away from the height of any burned trees.
• White Ash Pits: Deep pockets of fluffy white ash indicate burned-out tree stumps or root systems still glowing at 500 degrees Celsius (932 degrees Fahrenheit) underground. Stepping into a white ash pit causes catastrophic third-degree foot and leg burns. Step only on solid rock or thin black char, never into deep white ash depressions.
• Re-burn in Unburned Canopy: If only the ground needle litter burned ("underburn") while the green pine needles in the overhead tree crowns are still intact and unburned, a sudden wind shift can still cause a crown fire re-burn overhead. Only rely on The Black where either the canopy also burned or there are no dense overhead tree crowns.

Phase 3: Selecting a Last-Resort Survival Zone when overrun¶

If the wildfire is advancing too fast to escape and the flames are too tall (3+ meters / 10+ feet) to punch through into The Black, you have minutes to pick a Last-Resort Survival Zone to survive the passage of the flame front.

What kills you during an overrun: Radiant Heat and Superheated Gas¶

You do not have to be touched by a single flame to die in a wildfire. Two invisible killers precede and accompany the flame front:

1. Radiant Heat (Infrared Radiation): Travels in straight lines at the speed of light from the wall of flames. At 10 meters (33 feet) from a major crown fire, radiant heat flux exceeds 40 to 80 kilowatts per square meter, enough to blister bare human skin in 3 seconds and ignite clothing. Because radiant heat travels strictly in straight lines (line-of-sight), placing any solid, non-flammable barrier (a boulder, a dirt bank, a deep trench, or water) between your body and the flame wall blocks 100% of direct radiant heat.
2. Convective Superheated Air (Thermal Airway Injury): Turbulent gusts of superheated air (300 to 800 degrees Celsius / 572 to 1,472 degrees Fahrenheit) roll ahead of and through the flame front. Inhaling one breath of 300-degree air causes immediate laryngeal edema (swelling of the voice box and windpipe) that seals the airway shut. However, because hot air rises, the air layer within 10 to 15 centimeters (4 to 6 inches) of bare mineral dirt stays hundreds of degrees cooler and retains breathable oxygen.

Ranking Last-Resort Survival Zones from Best to Worst¶

Step-by-step Overrun Survival Procedure (The 10-Minute Flame Pass)¶

In most forest and brush wildfires, the intense flaming front takes only 2 to 10 minutes to pass over a stationary point (though smoke, embers, and radiant heat from burning logs continue afterward). If you are forced to lie down in a clearing, road cut, or behind a boulder:

1. Throw your backpack and stove fuel canister 20 meters (65 feet) away. Keep only your water bottles, a wool/cotton garment or leather gloves, and your satellite SOS device in a pocket underneath your torso.
2. Cover every square centimeter of bare skin with non-synthetic fabric and soil: Pull down cotton/wool sleeves, turn up your collar, put on leather or wool gloves, and pull a wet cotton bandana or merino wool buff over your nose, mouth, and ears. If you have bare arms or legs, rub wet mud or loose mineral dirt thickly over your exposed skin to reflect infrared heat.
3. Dig a "Breathing Pocket" in the dirt: Scrape a fist-sized hollow in the cool, damp mineral dirt directly beneath your nose and mouth. Press your face firmly into that dirt hollow with your damp cotton/wool cloth covering your mouth and nose.
4. Stay flat and DO NOT GET UP when the roar and heat peak: As the flame front hits the edge of your clearing, the noise will sound like a jet engine, darkness will be total, embers will shower your back, and the heat on your back and calves will be agonizing. Do not panic, do not lift your head to gasp, and do not stand up and run. Standing up puts your lungs into 500-degree-Celsius air and guarantees fatal airway burns within two breaths. Stay pressed flat into the dirt breathing slow, shallow breaths from the soil pocket until the roar subsides and the air cools.

Phase 4: Vehicle entrapment at a trailhead or forest road¶

Sometimes hikers make it back to their parked car at a remote dirt trailhead only to find the single-lane forest road out is already cut off by flames or fallen burning trees.

• A parked trailhead vehicle is safer than running on foot through burning brush, provided you position the car properly:
• Park on the barest ground available: Drive onto the center of the widest bare dirt/gravel parking pad or rocky turnout, as far away from trees, brush, and wooden trailhead kiosks as possible. Do NOT park over dry tall grass or pine needle beds (which will ignite directly underneath your gas tank and catalytic converter).
• Keep the engine idling (until oxygen drops) with headlights and hazard flashers ON: Keeping headlights and emergency flashers on allows firefighters and helicopters to spot your vehicle through dense black smoke.
• Roll all windows 100% UP and set climate control to "RECIRCULATE" (or turn vents OFF): Never leave windows cracked open; glowing embers and superheated toxic gas will blow inside the cabin.
• Get down on the vehicle floorboard below the window glass line: Window glass transmits radiant infrared heat directly onto your face and arms (and tempered side windows can shatter from extreme heat). Lie down on the floor mats below the level of the metal doors, and cover everyone completely with wool blankets, cotton jackets, or spare clothing/floor mats (never synthetic sleeping bags).
• Expect loud noises and stay inside until the main flame front passes: Tires may pop and melt, exterior plastic trim may catch fire, and heavy gusts will rock the vehicle. Modern automotive fuel tanks rarely explode immediately; stay low under the window line inside the metal cabin until the outside flame wall moves past, then exit onto the burned bare dirt upwind if the vehicle exterior catches fire.

Phase 5: Post-fire medical triage and navigating out of the burn zone¶

Once the main fire front has passed and the air cools enough to stand up:

1. Check for Airway Thermal Burns (Red Flag Number 1): Look at your companions' faces. Singed nasal hairs, soot around the mouth or in sputum, a hoarse or raspy voice, brassy cough, stridor (high-pitched wheezing when inhaling), or difficulty swallowing indicate inhalation thermal injury. The upper airway can swell completely shut over the next 1 to 4 hours. Re-trigger your Satellite SOS immediately and report "Suspected airway burns requiring immediate helicopter hoist/evacuation." Keep the victim sitting upright (semi-Fowler's position) to reduce airway swelling and minimize physical exertion.
2. Treat Cutaneous Burns Correctly: Cool active burns with clean cool water from your drinking bottles for 10 to 20 minutes if available, remove any melted clothing ONLY if it is not stuck to the skin (never peel melted nylon or polyester out of a burn wound; cut around it), and cover burns loosely with clean dry gauze or a clean cotton shirt (see Burns). Protect burn victims from hypothermia once the heat subsides.
3. Navigate Out Using "The Black" While Avoiding Post-Fire Deadly Hazards:
4. Never walk back into unburned green brush where shifting winds can reignite the flank. Stay inside The Black or on wide bare roads while waiting for rescue crews.
5. E kiaʻi mau i luna no ka hāʻule ʻana o nā kumulāʻau i puhi ʻia ("Widowmakers") a me lalo ** nā lua aʻa i puhi ʻia / nā lua lehu keʻokeʻo ** e hāʻule ana ma lalo o ka kāmaʻa holo wāwae.
6. E makaʻala i ka ʻōwili ʻana i nā pōhaku a me nā ʻōpala ma nā pali pali: Ma nā awāwa puʻu, hoʻopau nā ahi ahi i nā lāʻau a me nā pulupulu e hoʻopaʻa ana i nā pōhaku talus, e hoʻouna mau ana i nā pōhaku e like me ke kinipōpō e hāʻule i lalo i nā alahele ma hope o ka hala ʻana o ke ahi.

Nīnau pinepine¶

Nānā ʻia nā kumu¶

• National Wildfire Coordinating Group (NWCG) & United States Forest Service (USFS) (United States): Incident Response Pocket Guide (IRPG) (PMS 461, covering LCES, Escape Routes, Safety Zones, "The Black" vs. "The Green", Watch Out Situations, Fire Behavior slope/wind rules, and Last Resort Survival without a Fire Shelter).
• USFS Missoula Technology and Development Center (MTDC) (United States): The New Generation Fire Shelter and Surviving Fire Entrapments: Radiant vs. Convective Heat Physics and Breathable Air Layers at Ground Level.
• National Park Service (NPS) (United States): Backcountry Wildfire Preparedness and Trail Evacuation Protocols.
• Country Fire Authority (CFA) (Victoria) & NSW Rural Fire Service (NSW RFS) (Australia): Bushfire Survival when Caught on Foot or in a Vehicle (radiant heat shielding, wool/cotton clothing protection, and vehicle floorboard sheltering).
• Wilderness Medical Society (WMS) & American Burn Association (ABA) (United States): Prehospital Management of Thermal Burns and Acute Smoke / Airway Inhalation Injury in Austere Environments.

Nā alakaʻi pili¶

• Ke ahi ahi
• ʻO ka uahi ahi a me ka inhalation lehu
• Burns
• ʻO ke kalapona monoxide a me ka puhi ʻana i ka uahi ke kōkua mua
• Nalo i ka hele wāwae a i ʻole hoʻomoana
• Nā helu pilikia ma ka ʻāina