هنگام پیاده روی یا کولهپشتی در آتش سوزی گرفتار شدهاند¶
شماره های اضطراری بر اساس کشور متفاوت است. این صفحه از 911 استفاده میکند که شماره مربوط به ایالات متحده و کانادا است. بسیاری از کشورهای دیگر از 112، 999 یا شماره دیگری استفاده می کنند. شماره کشور خود را پیدا کنید.
در حالی که مایل ها از مسیر مسیر فاصله دارید، مشاهده یک ستون دود مرتفع، بوی سوزن سوزن های کاج، یا شنیدن صدای غرش قطار باری از آتش سوزی تاج دره ای که مایل ها از مسیر عبور می کنید، یک وضعیت اضطراری برای زندگی یا مرگ است. آتشسوزیهای جنگلی ناشی از بادهای دره و توپوگرافی شیبدار معمولاً با سرعت 10 تا 25 کیلومتر در ساعت (6 تا 15 مایل در ساعت) در جنگل و تا 35 کیلومتر در ساعت (22 مایل در ساعت) روی چمنهای خشک حرکت میکنند، بسیار سریعتر از آنکه هر انسانی بتواند با یا بدون کوله بدود. بیشتر تلفات کوهنوردان به این دلیل اتفاق میافتد که مردم دچار وحشت میشوند و سعی میکنند تا سربالایی جلوتر از شعلهها به سرعت بپرند یا در "دودکشهای" توپوگرافی باریک که در آن گازهای همرفتی فوقگرم به **800 درجه سانتیگراد (1472 درجه فارنهایت) میرسند، گیر افتادهاند. زنده ماندن در یک گیر افتادن آتش سوزی در مناطق جنگلی مستلزم خواندن فوراً فیزیک باد و شیب، حرکت جانبی (عمود بر مسیر آتش) و سرازیری، ضربه زدن از جناحی با شدت کم به داخل منطقه امن "سیاه" سوخته شده، حفر لباس های مصنوعی در حال ذوب شدن، و آماده سازی محل تشعشع آب معدنی، آماده سازی محل تابش آب معدنی اضطراری است. بیش از حد.
همین الان این کار را بکن¶
- فانوس SOS ماهواره خود را فعال کنید و با مختصات GPS دقیق خود فوراً با خدمات اضطراری تماس بگیرید. دکمه SOS را در Garmin inReach، Zoleo، ACR Personal Locator Beacon (PLB) یا Apple Emergency SOS از طریق ماهواره فشار دهید و با محل خود تماس بگیرید. شماره های اضطراری (911 در ایالات متحده و کانادا، 112 در سراسر اتحادیه اروپا، 999 در بریتانیا، 000 در استرالیا). طول/طول جغرافیایی، ارتفاع، نام مسیر، اندازه گروه، و جهتی که در حال حرکت هستید را به اطلاعتان برسانید تا هواپیماهای نقطهای آتشنشانی هوایی و خدمه هلیتاک بدانند که انسانها در آن بخش روی زمین هستند.
- هرگز سعی نکنید از یک آتش سوزی در سربالایی یا بالا رفتن از زهکشی تنگ دره ای پیشی بگیرید. آتش در سربالایی تا 16 برابر سریعتر از سراشیبی حرکت می کند زیرا افزایش گرمای همرفتی پوشش گیاهی بالای آن را پیش گرم کرده و خشک می کند و دره های باریک V شکل، دره های باریک، خندق ها و زین ها عمل می کنند. سرازیری و جانبی (با زاویه 90 درجه در عرض باد) از "سر" (لبه پیشرو) آتش دور شوید.
- **در صورت دسترسی به "سیاه" (زمینی که قبلاً تمیز سوخته است) بروید. ** در آتش نشانی حرفه ای در زمین های وحشی (سرویس جنگل های ایالات متحده و دکترین NWCG)، ایمن ترین مکان در آتش سوزی در "The Black" است زیرا هنگامی که تمام چمن های سطحی و قلم موها سوختند، آتش نمی تواند برای بار دوم آن زمین را بسوزاند. اگر در نزدیکی پشت سرد یا جناح کم شدت آتش هستید که شعلهها زیر 0.6 تا 0.9 متر (2 تا 3 فوت) ارتفاع دارند، از لبه نازک شعله به داخل منطقه خاکستر سیاه سرد شده بپرید و از گیرههای مرده ایستاده دور شوید.
- اگر به دام افتادن قریب الوقوع است، کوله پشتی سنگین خود را بردارید و تمام لایه های بیرونی پلی استر، نایلون و پشم مصنوعی را بردارید. اگر مجبورید برای زندگی خود به سرعت بپرید یا از گرمای تابشی جان سالم به در ببرید، کوله سنگین خود را فوراً رها کنید (فقط بطری های آب، SOS ماهواره، لایه های پشمی/پنبه ای و گلدان/مله فلزی را نگه دارید). پوسته های پلی پروپیلن، پلی استر فلیس و نایلون فوق سبک در دمای 160 تا 250 درجه سانتیگراد (320 تا 480 درجه فارنهایت) تنها از گرمای تابشی ذوب می شوند و حتی بدون اینکه شعله شعله شما را لمس کند، به سوختگی های عمیق درجه سه تبدیل می شود. 100% پشم، 100% پنبه (جین)، یا چرم بپوشید.
- **اگر نمی توانید فرار کنید، به دنبال یک منطقه بقای وسیع و بدون سوخت باشید (سرسره سنگ، میدان سنگی، سنگریزه یا چمنزار). چمنزار آلپ، یا یک دریاچه کم عمق یا نهر وسیع. تمام سوزنها، برگهای خشک را پاک کنید و روی خاک معدنی لخت را در حداقل شعاع 3 تا 6 متری (10 تا 20 فوت) اطراف خود بکشید.
- ** هنگام عبور از جلوی شعله، صاف و رو به پایین دراز بکشید و بینی و دهان خود را در خاک مرطوب یا پارچه نخی/پشمی خیس فشار دهید.** هرگز در حالی که جلوی شعله اصلی و موج دود فوق گرم از بالای محل عبور شما می گذرد، بلند نشوید یا فرار نکنید: یک نفس هوای فوق گرم در سطح چشم (**300+72 درجه سانتیگراد فارنهایت درجه سانتیگراد/*5) و در عرض چند دقیقه باعث تورم راه هوایی کشنده شود. کاملاً صاف روی خاک لخت دراز بکشید (یا در یک جریان سرد و پهن با یک پیراهن پشمی/پنبهای خیس روی سرتان دراز بکشید)، یک سنگر کوچک برای صورت خود حفر کنید تا لایه هوای خنکتر 15 سانتیمتری (6 اینچی) در کنار خاک را تنفس کند و تا زمانی که موج اصلی گرما عبور کند پایین بمانید.
flowchart TD
A["دود آتشسوزی، شعلههای آتش، یا باران اخگر را در حین حرکت در مسیر مشاهده کنید"] --> B["راه اندازی SOS Satellite / با مختصات GPS دقیق و جهت سفر با شماره 911-112-999-000 تماس بگیرید"]
B --> C{"موقعیت آتش، جهت باد و توپوگرافی را ارزیابی کنید"}
C -->|"آتش در زیر شما در یک دره یا در سربالایی به سمت شما حرکت می کند"| D["از سربالایی یا داخل زین/دودکش بالا نروید. از عرض (90 درجه نسبت به باد) عبور کرده و در زهکشی مخالف فرود می آیند"]
C -->|"نزدیک به پشت یا جناح با شدت کم (شعله های آتش کمتر از 0.9 متر / 3 فوت)"| E["به سرعت از یک شکاف نازک در پهلو به 'The Black' (منطقه از قبل سوخته) رد شوید."]
D --> F{"آیا می توانید قبل از جبهه آتش به سر راه، جاده آسفالت شده یا «سیاه» برسید؟"}
F -->|"بله"| G["در صورت نیاز، وسایل سنگین را رها کنید، آب و SOS را حفظ کنید، در سوخت کم (سنگ، چمن کوتاه) به سرعت باد متقاطع حرکت کنید."]
F -->|"خیر (به دام افتادن قریب الوقوع)"| H["منطقه بقا را انتخاب کنید: زمین وسیع تالوس/صخره سنگی، میله رودخانه شنی، نهر/دریاچه وسیع، یا پاکسازی خاک معدنی خراشیده"]
H --> I["تمام لباسهای نایلونی/پلیاستر مصنوعی و قوطیهای سوخت را بیرون بیاورید و در فاصله 20 متری بستهبندی کنید."]
I --> J["خاک معدنی خالی را خراش دهید، به صورت دراز بکشید و از طریق پارچه نخی/پشمی مرطوب در یک جیب خاکی نفس بکشید تا جلوی آن عبور کند."]
چرا وسایل مصنوعی در فضای باز (چادرهای نایلونی، کیسه خواب، و پیراهنهای پلی استر) یک تله کشنده در گرمای تابشی هستند؟
وسایل کوله پشتی فوق سبک مدرن تقریباً 100٪ از پلاستیک مبتنی بر نفت تشکیل شده است: چادرهای نایلونی با روکش سیلیکونی، برزنت های Dyneema، لایه های پایه پلی استر، کت های پشمی و کیسه خواب با پوسته های نایلونی 10 دنیر. هرگز داخل یک چادر کولهپشتی نایلونی یا کیسه خواب مصنوعی نروید تا از خود در برابر آتش سوزی در حال نزدیک شدن محافظت کنید. امواج فروسرخ تابشی که 30 تا 60 متر (100 تا 200 فوت) جلوتر از شعلهها حرکت میکنند، فوراً ذوب میشوند و چادر نایلونی را مشتعل میکنند و به یک کیسه خواب تبدیل میشوند. فر تمام پوسته ها و پشم های مصنوعی بیرونی را جدا کنید، پشم مرینوس، پنبه، یا چکمه/دستکش چرمی را روی پوست خود نگه دارید و از خاک معدنی، سنگ یا آب به عنوان مانع حرارتی خود استفاده کنید.
فاز 1: درک فیزیک آتش سوزی در مناطق کوهستانی و جنگلی¶
یک کوهنوردی که میداند آتش چگونه با توپوگرافی، سوخت و باد تعامل میکند، میتواند پیشبینی کند که آتشسوزی در کجا شتاب میگیرد و کجا متوقف میشود، و از تلههای زمینی دقیقی که هم کوهنوردان تفریحی و هم آتشنشانان وحشی را کشتهاند اجتناب کند.
4 قانون زمین و باد رفتار آتش سوزی¶
| Fire Behavior Factor | مکانیسم فیزیکی | Rate of Spread Impact | Tactical Rule for Hikers |
|---|---|---|---|
| 1. Slope Steepness (The Uphill Acceleration Law) | Flames lean toward an uphill slope, bathing the unburned brush above the fire in intense radiant heat while rising convective hot air pre-dries the canopy upslope. | For every 10-degree increase in slope, the wildfire's rate of uphill spread doubles (a fire moving at 3 km/h on flat ground accelerates to 12 km/h on a 20-degree slope and 24+ km/h on a 30-degree slope). | Never try to out-climb a fire uphill. Conversely, wildfires move very slowly downhill (unless pushed by extreme downslope winds like Santa Ana or Diablo winds). If you are below a fire on a calm afternoon, moving downhill away from it gives you a massive speed advantage. |
| 2. Topographic Chimneys, Gullies, and Saddles | Narrow V-shaped ravines, box canyons, chutes, and mountain saddles (passes between two peaks) constrict rising hot air and funnel wind like a blacksmith's bellows. | Creates explosive "blow-up" runs where flames erupt 50 to 100 meters (165 to 330 feet) into the air and race up the gully at 30+ km/h (20+ mph). | Treat narrow V-drainages, gullies, and ridge saddles as no-go death zones when fire is in the watershed. Stay on broad, open benches, flat valley bottoms, or the leeward side of barren rocky ridges. |
| 3. Diurnal Mountain Winds (Upslope by Day, Downslope by Night) | Solar heating of mountain slopes from 10:00 AM to 6:00 PM creates strong upslope and up-canyon thermal winds. After sunset, cooling air sinks, creating downslope winds. | Fire intensity, spotting distance, and uphill spread peak violently between 1:00 PM and 6:00 PM when temperature is highest, relative humidity is lowest, and upslope winds align with topography. | Expect a placid morning ground fire to explode into a fast-moving crown fire after 1:00 PM. Do not linger to "take photos" of a midday smoke column. |
| 4. Fuel Type (Light Flashy Fuels vs. Heavy Timber) | Dry cheatgrass, chaparral, sagebrush, and pine needle litter have a high surface-area-to-volume ratio ("flashy fuels") and ignite instantaneously. | Grass and brush fires move 3 to 5 times faster than closed-canopy timber fires (grass fires can exceed 20 to 35 km/h), though heavy timber burns much hotter and longer once ignited. | A grassy hillside looks easy to walk across, but a wind-driven grass fire will overrun a runner in seconds. However, grass burns out in 60 to 120 seconds, making "The Black" behind a grass fire immediately survivable. |
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:
- 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.
- 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.
- The Rear (Heel): The upwind / downslope back edge of the fire, which creeps slowly against the wind with low flames.
- 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.
- سوختن مجدد در سایبان نسوخته: اگر فقط بستر سوزن زمین سوخته شود ("زیر سوخته") در حالی که سوزن های کاج سبز در تاج درخت بالای سر هنوز دست نخورده و نسوخته اند، یک جابجایی ناگهانی باد همچنان می تواند باعث ایجاد آتش سوزنی مجدد بالای سر شود. فقط به The Black تکیه کنید که در آن تاج درخت نیز سوخته است یا تاج درختان بالای سر متراکم وجود ندارد.
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:
- 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.
- 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¶
| Survival Zone Option | Survival Rating | How to Position Yourself to Survive | Critical Pitfalls to Avoid |
|---|---|---|---|
| 1. Large Talus / Scree Boulder Field or Barren Granite Slab | Excellent (Zero fuel) | Move at least 30 to 50 meters (100 to 165 feet) into the center of the bare rock field away from the forest edge. Tuck your body down into a depression behind a large boulder facing away from the approaching fire so the solid granite blocks line-of-sight radiant heat. | Do not crawl into a deep, narrow vertical rock chimney where convective smoke and heat will funnel upward. |
| 2. Wide River, Lake, or Deep Mountain Stream | Excellent (If wide and accessible) | Wade into water at least 0.6 to 1 meter (2 to 3 feet) deep away from overhanging brushy banks. Submerge your body up to your chin, drape a wet wool or cotton shirt/towel over your head and face, and breathe through the wet cloth just above the water surface as the flame front passes over the banks. | Never shelter in a tiny, narrow dry creek bed choked with willow brush (riparian brush burns hotter than almost any other fuel). Never climb into an elevated plastic/wooden water tank or stock trough where the water will boil. |
| 3. Wide Dirt Road, Bulldozer Fireline, or Gravel Bar | Good | Lie flat face-down in the road ditch or against the cut-bank on the side closest to the approaching fire (so the dirt cut-bank deflects radiant heat and flames up and over your back). Scrape away all dry grass and pine needles for 3+ meters around you. | Do not stand or run down a smoky road where zero-visibility firefighting vehicles or falling trees can strike you. |
| 4. Scraped Bare-Dirt Clearing in Sparse Timber / Meadow | Last Resort | Choose the widest natural opening with the shortest grass. Use your boot heels, trekking pole, or metal trowel/pot to scrape a 2-by-3-meter (6-by-10-foot) patch down to bare mineral dirt. Dig a shallow 15-centimeter (6-inch) depression for your face and torso. Lie completely flat face-down with feet pointed toward the approaching flames. | Ditch your backpack and isobutane stove fuel canisters at least 15 to 20 meters (50 to 65 feet) away before lying down so your pack does not catch embers on your back and your stove gas canister does not explode next to your head. |
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:
- 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.
- 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.
- 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.
- 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:
- 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.
- 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 می سوزد). Protect burn victims from hypothermia once the heat subsides.
- Navigate Out Using "The Black" While Avoiding Post-Fire Deadly Hazards:
- 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.
- Watch overhead continuously for falling burned trees ("Widowmakers") and underground burned-out root cavities / white ash pits that collapse under a hiker's boot.
- Beware of rolling rocks and debris on steep slopes: In steep mountain canyons, wildfires burn away the logs and brush holding talus rocks in place, sending bowling-ball-sized rocks tumbling down onto trails continuously after the fire passes.
سوالات متداول¶
Should I pour my drinking water all over my clothes and backpack before escaping a wildfire?
Be strategic with your limited water. Wetting a 100% cotton bandana or merino wool buff to tie over your nose and mouth (and wetting a cotton/wool shirt or hat just before crossing through a low flame flank into The Black or lying down for an overrun) is highly effective because evaporating water absorbs latent heat and filters hot smoke particles. However, do NOT dump all of your drinking water over your clothes 45 minutes early while trying to hike out: in 45-degree-Celsius (113-degree-Fahrenheit) radiant heat and low humidity, wet clothes dry completely in 10 minutes, and severe dehydration will cause heat exhaustion and muscle cramping that prevents you from moving fast. Keep at least 1 liter of drinking water inside your bottle to sip and to wet your breathing cloth at the final moment of need.
Can I use my Mylar " emergency space blanket" from my first aid kit as a wildland fire shelter?
NO, never wrap yourself in a Mylar emergency space blanket during a wildfire. While an official USFS Wildland Fire Shelter looks foil-coated on the outside, it is a specialized multi-layer laminate of woven silica, fiberglass, high-temperature adhesive, and heavy aluminum foil engineered to withstand 500+ degrees Celsius. A consumer Mylar space blanket is an ultra-thin sheet of PET plastic (polyester film) with a microscopic vapor-deposited aluminum tint that melts, shrinks, and ignites at roughly 250 degrees Celsius (482 degrees Fahrenheit), melting plastic directly onto your skin. Leave the Mylar space blanket in your ditched pack and use bare mineral dirt, boulders, or water instead.
How can I tell while hiking if a distant smoke column is moving toward me or away from me?
Look at two indicators: the lean angle of the smoke column and the color and texture of the base vs. top. If the smoke column is leaning toward your position or ashes and charred pine needles begin falling around you like snow, you are directly downwind in the path of the Head of the fire (and in the ember spot-fire zone). Dense black or dark copper/brown boiling smoke indicates heavy timber or brush burning intensely at high speed, whereas thin, lazy white smoke usually indicates lighter grass or cooling fuels. Do not wait to see flames, if ash is falling on you or visibility drops, evacuate perpendicular to the wind immediately.
If I see a firefighting helicopter or air tanker flying low overhead, what should I do?
First, try to make yourself visible in an open clearing (waving a bright non-synthetic garment or signaling mirror) ONLY when a small spotter plane or helicopter is searching for you. Second, if a large air tanker or heavy helicopter with a water bucket makes a low-altitude pass directly in line with your position, get flat on the ground behind a boulder or wide tree trunk immediately (facing away with hands protecting your head). A 4,000-to-15,000-liter (1,000-to-4,000-gallon) drop of Phos-Chek fire retardant slurry or water dropped at 130 knots weighs up to 15 metric tons: a low drop can snap 30-centimeter (12-inch) tree trunks in half, send boulders flying like shrapnel, and kill an upright person on impact. If you are coated in red Phos-Chek retardant, rinse it off your eyes and skin with water when safe; it is mostly ammonium phosphate fertilizer and is slippery but non-toxic in brief skin contact.
Why is digging a shallow trench in bare mineral dirt so effective at keeping you alive during an overrun?
Soil is one of nature's best thermal insulators. Even during a catastrophic crown fire that burns at 1,000 degrees Celsius (1,832 degrees Fahrenheit) in the tree canopy overhead, heat penetrates downward into bare mineral dirt by only 2 to 5 centimeters (1 to 2 inches). Furthermore, because superheated air is buoyant and rises violently upward in the fire's convection column, a thin boundary layer of cooler, denser air hugs the lowest depressions of the bare ground. Pressing your body flat into a scraped dirt trench keeps your back below the main radiant/convective blast and lets your nose draw air from that cool 10-centimeter boundary layer.
Where can I learn official wilderness first aid and burn care before my next backpacking trip?
Take a hands-on Wilderness First Aid (WFA) or standard First Aid and CPR course through the American Red Cross, St John Ambulance, NOLS Wilderness Medicine, or a certified local provider, and always check official national fire agency maps (such as InciWeb in the United States, Canadian Wildland Fire Information System, or state Emergency WA / NSW RFS Fires Near Me apps in Australia) before stepping onto a summer or autumn trail.
منابع بررسی شد¶
- 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.