ʻO nā ʻino hau, ka ua hau, a hāʻule ka laina uila¶

ʻO ka ʻino hau he pōʻino i ka wā hoʻoilo i hoʻokumu ʻia e ka ua lōʻihi o ka ua hau, he ʻano ʻano meteorological kahi e hāʻule ai ka ua wai ma kahi papa hau hau ma luna pono o ka honua (\(0^\circ\text{C}\) [\(32^\circ\text{F}\)] a i ʻole ke anu) a maloʻo i ka hoʻopili ʻana i loko o kahi pepa paʻa a ʻālohilohi o kēlā me kēia ʻili hau.** ʻAʻole like me ka hau hau e hoʻopau ana i nā lālā a me nā uea, ʻo ka nui o ka hau hau ma kahi o 900 kilokani no ka mika cubic (\(56\text{ paona no ka cubic foot}\)): he hōʻiliʻili hau radial o 13 a 25 millimeters (0.5 a 1.0 ʻīniha) hoʻohui ʻia 00 a 1.0 paona (0 a 5 kilokani) paona make i ka laina mana hoʻokahi a me he mau metric tona o ka hau i ka uhi o kahi kumulāʻau oʻo. I ka wā e paʻi ai nā lālā e like me nā pana raifela a me nā hale kiaʻi hoʻoili kila i ka hopena domino, hiki i nā miliona o nā hale ke nalowale i ka uila a me ka wela no nā lā a i ʻole mau pule aʻo nā alanui e lilo i ʻāpana hiki ʻole ke hele i ka hau frictionless.

E hana i kēia i kēia manawa¶

1. Noho i loko a ma kahi mamao aku i nā lumi ma lalo o nā kumulāʻau nui e kau ana i ka wā e hōʻiliʻili ana ka hau. Ke ʻoi aku ka nui o ka hau radial glaze ma mua o 6 millimeters (0.25 iniha), hoʻomaka nā lālā lāʻau nui a me nā kumu lāʻau pāpaʻu holoʻokoʻa e hāʻule i nā hale me ka ʻole o ka ʻōlelo ʻana, ʻoiai ke ʻoi aku ka ikaika o ka makani ma mua o **25 a 40 mau mile i ka hola. E hoʻoneʻe i nā ʻohana a me nā holoholona mai nā lumi moe o ka papahele ma lalo pono o nā ʻoka nui, pine, maple, a i ʻole birch canopies a me kahi malu ma ka papahele haʻahaʻa.
2. E noho loa ma waho o nā alanui: ʻaʻole hiki i nā huila 4-Wheel Drive (4WD) a i ʻole nā ​​huila hoʻoilo ke hoʻopaʻa i ka hau mākū. Hoʻokumu ka ua hau i kahi kiʻiʻoniʻoni liʻiliʻi o ka wai wai ma luna o ka hau ʻālohilohi ma ka \(0^\circ\text{C}\) (\(32^\circ\text{F}\)), e hoʻokuʻu ana i ka huki huila i kahi kokoke i ka zero a me ka hoʻonui ʻana i ka mamao hoʻomaha**. ʻO nā kaʻa kinai ahi a me nā palau hau e hoʻoheheʻe ʻia ma nā ʻaoʻao mai nā ala nui ma mua o ka hiki ʻana i nā kaʻa paʻakai ke mālama i ke alanui. Mai kaʻa ke ʻole ke haʻalele ʻana i kahi lāʻau lapaʻau weliweli a i ʻole ke kūkulu ʻana i ka pilikia.
3. E mālama i kēlā me kēia uea i hoʻohaʻahaʻa ʻia, ke kaula e kau ana, a me nā lālā lāʻau paona hau e hoʻopā ana i kahi uwea e like me ka ikaika a me ka make. E mālama i kahi palena palekana o 10 mika (35 kapuaʻi) (e ʻoi aku inā e lele ana nā laina uila uila kiʻekiʻe) a puni kekahi uea hāʻule, pou pono, a i ʻole ka pā metala e pili ana i kahi uea. Mai ho'āʻo e hoʻokuʻu i lalo a kīpaku paha i kahi uwea haʻahaʻa i piha i ka hau a i ʻole lālā lāʻau me kahi lāʻau broomstick a i ʻole ʻōʻō hau: hoʻoheheʻe ʻia ka uila uila kiʻekiʻe i lalo o kou puʻuwai. Kāhea i kāu laina ulia pōpilikia a i ʻole ka helu pilikia kūloko (911 ma ʻAmelika Hui Pū ʻIa a me Kanada, 112 ma waena o ka European Union, 999 ma United Kingdom, a i ʻole e ʻike i nā mea āpau. helu pilikia).
4. Inā hāʻule ka laina uila i kāu kaʻa, e noho i loko inā ʻaʻole e wela ka kaʻa i ke ahi, a laila e lele mālie me nā wāwae ʻelua a hoʻokuʻu a lele. ʻOiai e noho ana i loko o ke keʻena, hana kou mau kaʻa kaʻa a me ke kaʻa metala ma ke ʻano he pale o Faraday. Inā hoʻokuke ʻia ʻoe e ke ahi, wehe i ka puka, mai hoʻopā i ke kino o ke kaʻa metala a me ka lepo hau i ka manawa like, lele i waho ** i pae nā wāwae ʻelua i ka honua i ka manawa hoʻokahi**, a ** ʻāwili a i ʻole bunny-hop me kou mau wāwae i paʻa pono ** no ka liʻiliʻi loa ** 10 a 15 mau mika (35 a 50 kapuaʻi)** e pale ai i ka lethal ** mai ka piʻi ʻana o ka uila i lalo.
5. E hoʻohui i kou ʻohana i loko o hoʻokahi lumi "micro-heated" hoʻokahi inā pio ka uila. Ma kahi o ka hoʻāʻo ʻana e wela i ka hale maloʻo holoʻokoʻa, e koho i hoʻokahi lumi liʻiliʻi o loko (ma ka papahele o ka honua me ka liʻiliʻi o nā puka makani a me ka ʻike hema), e kau i nā pākeʻe a i ʻole nā ​​lole lole kaumaha ma luna o nā puka makani a me nā puka, e ʻōwili i nā kāwele i ka pohā o ka puka o lalo, a e kau i kahi hale hoʻomoana i loko o ka lumi i hoʻopaʻa ʻia.
6. E pale i ka make ʻana o ka carbon monoxide i loko a me ka pohā koke ʻana o ka paipu hau. E hōʻoia i ka hana ʻana o kēlā me kēia pākaukau Carbon Monoxide (CO) alarm ma mua o ka hoʻomālamalama ʻana i kahi kapuahi a i ʻole ka hoʻomaka ʻana i kahi mīkini hana waho (i waiho ʻia ** ma kahi liʻiliʻi he 6 mika [20 kapuaʻi] ma waho** me ka hoʻokuʻu ʻana mai ka hale). No ka mālama ʻole ʻana o nā paipu wai i ka maloʻo a pohā i ka wā o ka ʻeleʻele, e wehe i nā puka keʻena ma lalo o ka lumi kuke a me ka lua ʻauʻau wai a hoʻohuli i nā paipu ʻoi loa i kahi ** lohi a paʻa paʻa i ka pahu wai o ka hale nui a hoʻokahe i nā kīʻaha a pau ** inā hāʻule ka mahana o loko ma lalo o \(0^\circ\text{C}\)\(circ (\)32^}).\

Hoʻopau ka ʻino hau a me ka laina mana i ka palapala hoʻoholo ola¶

Follow this step-by-step emergency decision tree when an Ice Storm Warning is issued or glaze ice begins snapping trees and power lines.

flowchart TD
    Start["'Ōlelo Aʻoaʻo ʻino / Ua Haʻihuʻi Paʻa:<br/>Nā alanui, nā kumulāʻau, a me nā laina mana."] --> LocationCheck{"Aia i hea ʻoe i kēia manawa?"}

    LocationCheck -->|"Loaʻa i loko o kahi kaʻa i waho"| WireOnCar{"Ua hāʻule paha kahi laina mana a i ʻole<br/>lāʻau uila ma luna o kāu kaʻa?"}
    WireOnCar -->|"ʻAe: Uea ma ke kaʻa"| StayInCar["1. NOHO I loko o ka kaʻa a kelepona iā 911 / 112 / 999<br/>2. E aʻo aku i ka poʻe e kū ana e noho i hope 10 mika (35 kapuaʻi)<br/>3. Ina wale ke ka'a i ke ahi: E lele pololei me na wawae elua<br/> (mai hoopa aku i ke ka'a a hoopa'i i ka manawa hookahi) a hookui wawae i 15 m ka mamao."]
    WireOnCar -->|"ʻAʻole: Heheʻe ma luna o ka hau aniani"| PullOffRoad["E haʻalele i ke alaloa ma kahi kaʻa kaʻa palekana e hiki mai ana (ma kahi o nā kumulāʻau a me nā pou hoʻohana)<br/>E kali i ka ua hau; ʻike i ke alakaʻi ʻo Flash Freeze & Black Ice inā pae ʻia"]

    LocationCheck -->|"Iloko o ka Home a Hale paha"| TreeRoofCheck{"Ke uwē nei paha nā lāʻau nui i uhi ʻia i ka hau<br/>a i ʻole e paʻi ana ma luna o kou hale?"}
    TreeRoofCheck -->|"ʻAe"| MoveDownstairs["E neʻe koke i ka papahele haʻahaʻa / ke ala o loko mai ka ʻaoʻao kumu lāʻau<br/>Mai hele i waho ma lalo o nā kumu lāʻau aniani (make koke nā lālā hāʻule)"]
    TreeRoofCheck -->|"ʻAʻole"| PowerStatus{"Ua pau ka mana o ka uila?"}
    MoveDownstairs --> PowerStatus

    PowerStatus -->|"HALA ka mana"| PreBlackoutPrep["1. Charge all phones, power banks, and medical batteries to 100%<br/>2. Crank home thermostat up 2 to 3 C (4 to 5 F) to pre-warm thermal mass<br/>3. Fill bathtubs and pots with water; locate main water shutoff valve"]

    PowerStatus -->|"Power OUT (Multi-Day Freezing Blackout)"| HeatAndWater["1. Unplug sensitive electronics (leave 1 lamp switched on to signal return)<br/>2. Seal off and shelter in ONE small interior room (use tent + blankets)<br/>3. Run generators ONLY outdoors >= 6 meters (20 feet) from house<br/>4. NEVER use charcoal grills, gas ovens, or camp stoves indoors<br/>5. Drip faucets or shut off main water valve + drain pipes if house < 0 C (32 F)"]

Meteorology and physics: Why freezing rain is far more dangerous than snow or sleet¶

Many people confuse freezing rain with sleet (ice pellets) or snow, yet their impact on infrastructure is completely different. Both begin high in the clouds as falling snowflakes that pass through an elevated warm layer of air ("warm nose" above \(0^\circ\text{C}\) [\(32^\circ\text{F}\)]) at roughly \(800\text{ to }1,500\text{ meters}\) (\(2,600\text{ to }5,000\text{ feet}\)) altitude, melting the snow completely into liquid raindrops:

• Sleet (Ice Pellets): If the sub-freezing cold air layer near the ground is deep (more than \(400\text{ to }600\text{ meters}\) [\(1,300\text{ to }2,000\text{ feet}\)] thick), the falling raindrops have enough time to freeze back into hard, translucent little ice balls before they hit the ground. Sleet bounces off tree branches, power lines, and windshields like dry sand and rarely brings down the power grid.
• Freezing Rain (Glaze Ice): If the sub-freezing layer hugging the ground is shallow (only \(100\text{ to }300\text{ meters}\) [\(300\text{ to }1,000\text{ feet}\)] deep), the falling liquid raindrops do not have time to freeze in midair. Instead, they become supercooled liquid water droplets (liquid water cooled below \(0^\circ\text{C}\) [\(32^\circ\text{F}\)]). The instant a supercooled raindrop strikes a sub-freezing power line, tree twig, bridge deck, or handrail, it spreads out into a thin film and freezes solid on contact, locking around the object like epoxy resin.

The Sperry-Piltz Ice Accumulation Index (SPIA) and weight load physics¶

Hoʻohana ka poʻe Meteorologists ma United States National Weather Service (NWS) a me nā mea ʻenekinia pono i ka mānoanoa o ka hau radial i hui pū ʻia me ka wikiwiki o ka makani e wānana i ka hāʻule ʻana o nā ʻoihana pōʻino:

Why wind turns a moderate glaze into a grid-destroying weapon: "Conductor Galloping"¶

Weight alone is only half the danger to power lines and trees. As freezing rain drips down the bottom of a cylindrical wire and freezes into icicles, it changes the cross-section of the wire from a smooth circle into a teardropshaped airplane wing (airfoil). When post-storm winds of 30 to 60 kilometers per hour (20 to 38 miles per hour) blow across that ice-coated airfoil, aerodynamic lift causes the entire 100-meter span of heavy wire to buck up and down violently in waves 1 to 3 meters (3 to 10 feet) high, a phenomenon electrical engineers call conductor galloping. Galloping wires slam into each other (causing blinding blue-green arc flashes and transformer explosions) and rip wooden utility poles and steel crossarms straight out of the frozen ground.

Downed power lines, electrified trees, and ground-gradient "step potential" survival¶

During an ice storm, thousands of distribution lines (\(7,200\text{ to }34,500\text{ volts}\)) and household service drops (\(120/240\text{ volts}\)) are pulled down into yards, driveways, and sidewalks by falling tree limbs.

1. Why live wires do NOT spark on ice or snow: Movies teach people that downed power lines always whip around throwing bright yellow sparks. In reality, high-voltage utility lines only arc and spark briefly when making intermittent contact; once resting on ice, snow, asphalt, or wet wood, an energized 13,800-volt line lies completely still and silent. In addition, utility grid automatic reclosers are programmed to automatically attempt to re-energize a tripped line several times over seconds or minutes to clear temporary branch contacts, meaning a "dead" wire can suddenly surge back to 13,800 volts while you are standing next to it.
2. How wet glaze ice turns trees and fences into deadly conductors: When an ice-laden tree branch leans against an overhead distribution wire without snapping it, high-voltage current travels down through the wet glaze ice and sap of the tree trunk into the earth. Touching the tree trunk, stepping on its roots, or touching a metal chain-link fence or metal guardrail up to 100 meters (300 feet) away where a wire has fallen across the fence further down the street will electrocute you instantly.
3. Understanding "Step Potential" and how to shuffle/hop to safety: When a high-voltage wire touches the ground, electricity radiates outward through the soil and ice in concentric rings like ripples in a pond: the ground right touching the wire might be at \(10,000\text{ volts}\), a ring \(1\text{ meter}\) (\(3\text{ feet}\)) away at \(7,000\text{ volts}\), and a ring \(2\text{ meters}\) (\(6\text{ feet}\)) away at \(4,000\text{ volts}\). If you take a normal walking stride near a downed line so your front foot is on the \(7,000\text{ V}\) ring and your back foot is on the \(4,000\text{ V}\) ring, \(3,000\text{ volts}\) of potential difference ("step potential") shoots straight up one leg, through your pelvis and torso, and down the other leg.
4. Escape Technique: Press your ankles and feet tightly together so both feet stay at the exact same voltage potential, and shuffle heel-to-toe without ever lifting a foot or separating your soles by more than a few centimeters (or hop like a rabbit landing on both feet simultaneously) until you are at least 10 to 15 meters (35 to 50 feet) away from the wire, pole, or vehicle.

Surviving a multi-day freezing blackout indoors without carbon monoxide poisoning¶

When an ice storm snaps thousands of individual neighborhood poles, utility line crews must saw through miles of fallen trees before they can set a single new pole, meaning residential neighborhoods routinely wait 3 to 14 days for power in sub-freezing temperatures.

Safe vs. lethal indoor emergency heating and cooking methods¶

Kaʻanuʻu-a-ʻanuʻu: Pehea e mālama ai i kou mau paipu wai home mai ka hau a pohā¶

Hoʻonui ʻia ka wai ma kahi o 9 pākēneka o ka leo i ka wā e maloʻo ai i ka hau ma \(0^\circ\text{C}\) (\(32^\circ\text{F}\)), e hana ana ma luna o 2,000 paona i kēlā me kēia ʻīniha huinaha (\(14,000\text{ kPa}\)) o ke kaomi hydraulic ma lalo o ke kahawai hau, e lawa no ka hoʻokaʻawale ʻana i ka PEX, PVC, a hiki i ka hoʻoheheʻe ʻana i ka paipu i loko o kou pā hale. hau hau:

1. ** ʻOiai he koena koena mehana i loko o ka hale (Ka mahana o loko ma waena o \(2^\circ\text{C}\) a me \(10^\circ\text{C}\) [\(35^\circ\text{F}\) a i \(50^\circ\text{F}\)])**:
2. Wehe i nā puka vanity a me nā keʻena keʻena ma lalo o ka lumi kuke, ka lumi ʻauʻau, a me ka lumi holoi holoi (ʻoi aku ka nui o nā poho i kau ʻia ma kahi **waho waho **) i hiki ke kaʻapuni ka ea lumi a puni nā paipu.
3. E ho'ā i ka paau wai wela a me ka wai anu ma nā ʻauwaʻa ma kahi mamao loa mai kahi e komo ai kāu laina wai nui i loko o ka hale a hiki i ka holo ʻana o kahi ** mau, penikala-lead-tihi-māmā** i loko o ka ʻauwai. ʻAʻole hiki i ka wai hoʻoneʻe ke kū i ka maloʻo, a ʻo ka wai hāmama e hoʻokuʻu i ke kaomi hydraulic hoʻopōʻino inā hoʻomaka kahi pahu hau i loko o ka paipu.
4. Inā e hāʻule ana ka mahana o loko o ka hale i lalo a i ʻole \(0^\circ\text{C}\) (\(32^\circ\text{F}\)) a i ʻole e haʻalele ana ʻoe i kahi kikowaena hoʻomehana:
5. Mai hilinaʻi i nā paipu kulu i ka wā e maloʻo ai ka loko o ka hale (ʻoi aku ma mua o nā pahele a pau a me nā ʻauwai e maloʻo paʻa a kahe).
6. Hoʻopaʻa koke i ka pahu wai o ka hale nui (aia ma ka haʻahaʻa, ke keʻena hoʻohana, ka pahu kolo, a i ʻole ka pahu mita waho o lalo o ka honua; e hoʻohuli i ka pahu lever he 90 degere e kū pono ana i ka paipu, a i ʻole e hoʻohuli i ka pahu huila pōʻai i ka uaki a hiki i ka ʻoluʻolu).
7. Wehe i kēlā me kēia paipu wela a me ke anu i loko o ka hale (mai ka papahele o luna a hiki i ka lua haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa hoʻohana pono kīwī a me nā paipu hose waho) no laila e hoʻokahe ka umekaumaha i ka wai kū mai loko mai o nā paipu kū pololei.
8. Holo i kēlā me kēia halepaku i hoʻokahi manawa no ka hoʻokahe ʻana i ka pahu, a ninini i ka wai ʻawaʻawa ʻole RV / marine propylene glycol antifreeze (a i ʻole ka wai holoi makani / wai paʻakai paʻa i ka wā ulia pōpilikia; ʻaʻole loa e kaʻa i ka radiator ethylene glycol inā hiki i nā holoholona ke inu) i loko o ka pahele kīʻaha kīʻaha a hoʻopaʻa i nā pahele P i ʻole e pohā nā pahele wai.
9. E hoʻopau i ka mea hoʻomaha kaapuni a i ʻole ka pahu hoʻokele kinoea i kāu mea hoʻomehana wai wela inā ʻoe e hoʻokahe i ka pahu wai wela, no laila ʻaʻole e pau ka mea hoʻomehana i ka maloʻo ke hoʻi koke ka mana pūnaewele.

Hoʻihoʻi maikaʻi ʻia ma hope o ka ʻino hau: pale i ka ʻeha "Widowmaker" a me nā ʻeha kaulahao.¶

Ke piʻi ka mahana ma luna o \(0^\circ\text{C}\) (\(32^\circ\text{F}\)) ma hope o ka ino hau, hoʻomaka ka puka makani 12-a-24-hola:

• Haʻule nā ​​lālā hau a me nā lālā "Widowmaker" i ka wā o ka wai: I ka hoʻomaʻamaʻa ʻana o ka lā i ka ʻili o ka lāʻau a me ke kūkulu ʻana i nā hale, nā ʻāpana hau aniani ʻO ke kaumaha ʻo 10 a 50 kilokani (22 a 110 paona) a me nā pahu hau ka lōʻihi o ka mika e hemo koke a hāʻule mai 10 a 20 mika (30 a 65 kapuaʻi) ma luna o ke poʻo e like me guillotine. I ka manawa like, ʻo nā lālā lāʻau māhā i paʻa wale ʻia e nā alahaka hau hau i ka wā e hehee ai ka hau. E hoʻohana i ka pāpale paʻa inā pono ʻoe e hele i waho, mai hele wāwae ma lalo o ka hale a i ʻole nā ​​kumu lāʻau ʻino, a mai hoʻokuʻu i nā keiki e pāʻani ma lalo o nā kumu lāʻau i uhi ʻia i ka hau.
• ** "Springpoles" i hoʻopiha ʻia i ka wā e hoʻomaʻemaʻe ai i nā kumulāʻau hāʻule**: Mai hoʻohana i ka ʻuala e ʻoki ai i kahi kumu lāʻau i hāʻule a i ʻole lālā i piʻo i lalo o ka ʻuʻuku ma lalo o kekahi kumulāʻau koʻikoʻi (he springpole) a i ʻole ka wili ʻia ma kahi kokoke i kahi uea pono. I ka wā e ʻoki ʻia ai, ʻoki ʻia kekahi lālā maloʻo i hoʻopaʻa ʻia me nā tausani o Newtons o ka ikaika, nahaha nā ʻāwae, nā umauma, a me nā ʻāʻī. E waiho i nā hana lāʻau a pau ma kahi o nā laina pono i hoʻomaʻamaʻa ʻia i nā mea hana arborists, a ʻike i kā mākou alakaʻi hoʻomaʻemaʻe ʻino a hoʻōla no nā protocol chainsaw palekana.

Nīnau pinepine¶

Nānā ʻia nā kumu¶

• Nā Kūlana Kūlana ʻĀina (NWS / NOAA, ʻAmelika Hui Pū ʻIa): Ka Sperry-Piltz Ice Accumulation Index (SPIA), Ice Storm Warning Criteria, and Winter Weather Safety Guidelines.
• Environment and Climate Change Canada (ECCC) a me Public Safety Canada: Severe Winter Weather and Ice Storm Preparedness Protocols (e hoʻokomo ana i nā haʻawina mai ka 1998 Eastern North American Ice Storm a me 2023 Quebec Ice Storm).
• Nā Center for the Disease Control and Prevention (CDC, United States) a me Consumer Product Safety Commission (CPSC, United States): Carbon Monoxide Poisoning Poisoning After Winter Storms and Outages Power (6-mika / 20-foot generator placement rule) a me Hypothermia Prevention Indoors.
• Electrical Safety Foundation International (ESFI) and Occupational Safety and Health Administration (OSHA, United States): Downed Power Line Step-Potential Physics, Vehicle Exit Procedures, and Portable Generator Backfeeding Hazards.
• ** Keʻena Hoʻokele Hoʻokele Hoʻokele Federal (FEMA / Ready.gov, ʻAmelika Hui Pū ʻIa) a me ke Keʻa Ulaula ʻAmelika:** Nā Kūlana Kūlohelohe ʻO ka ʻino o ka hoʻoilo a me nā pae hoʻopaʻa paʻa paipu.

Nā alakaʻi pili¶

• ʻO ka ʻino a me ka hau hau
• Paʻu uila a me ka hoʻokele hau ʻeleʻele
• ʻO ka hypothermia a me ka hau hau ke kōkua mua
• ʻO ke kalapona monoxide a me ka puhi ʻana i ka uahi ke kōkua mua
• ʻO ka hoʻomaʻemaʻe a me ka hoʻihoʻi hou ʻana i ka ʻino a me ka makani