Heat Stress Train

7/18/2019 Heat Stress Train

http://slidepdf.com/reader/full/heat-stress-train 1/37

Heat StressHeat Stress

EssentialsEssentials

Prevention in Action



OutlineOutline

• Heat stress/strain health efects• What you can do to prevent them• What the law says• Simple ways to monitor the heat



Symptoms: General

eeling o tirednessor atigue.

First Aid: Fluidreplacement andrest.

Transient Heat Fatigue:Transient Heat Fatigue:



First Aid: Practice goodpersonal hygiene !eepthe s!in clean and thepores unclogged" allows!in to dry" wear looseclothing" see doctor i rashpersists.

Heat Rash (prickly heatHeat Rash (prickly heat

Symptoms: S!in#ecomes reddened andmay itch" eel pric!ly or

hurt.



Symptoms: Syncope means$ ainting.% First signs aredi&&iness" eeling light'headed and perhapsnauseous" then the personmay aint. (sually occurs in

the #eginning o heat stressseason #e ore the circulationsystem is adapted.

First Aid: )ay victim in a cool

location hori&ontally witheet elevated. * conscious"give +uids. ,reatment thesame as shoc!.

HeatHeatSyncopeSyncope(!ainting(!ainting



Symptoms: -ramping oeither active muscles arms"legs or involuntary usuallya#dominal muscles or#oth .

First Aid: 0eplenishelectrolytes through drin!ing

o +uids such as Gator'1de"S2uincher" Power1de" etc'1de. 0est in a coolenvironment.

Heat "ramps:Heat "ramps:



Symptoms: 3ausea"di&&iness" wea!nessheadache" #lurred vision"pro use sweating" cold/wet

clammy grayish s!in"unconsciousness" coma anddeath.

First Aid: Place victim in aprone position in a coollocation" administer +uids ithe victim is conscious. *unconscious" see! medicalcare or transport to amedical emergency room.

Heat E#haustion:Heat E#haustion:



Symptoms: -hills" restlessness"irrita#ility" euphoria" red aceand s!in" disorientation"hot/dry s!in not always "collapse" unconsciousness"

convulsions and death.First Aid: *mmediate"

aggressive cooling o thevictim4s #ody using wet cloths"

immersion into cold water oralcohol wipes. Transport toemergency medical !acilityASAP$

Heat Stroke:Heat Stroke:



%atch out !or each%atch out !or each

other$other$• 1 wor!er heading into a heat

stro!e will no longer reali&e

what4s happening to him/her• *t is vital that co'wor!ers #e

a#le to recogni&e what4shappening and intervene

• Without 2uic! attention" theco'wor!er may die5



&ndirect Health E'ects:&ndirect Health E'ects:

Reduced %ork Per!ormance: tired" atiguedwor!ers per orm with reduced accuracy" e6ciency

&ncreased Accidents: tired" atigued wor!ers aremore suscepti#le to accident and in7ury

Reproductive Pro lems: heat has #een shown toreduce #oth male and emale ertility and can #e apro#lem or the etus

Heart)*ung Strain: i you already have heart" lung"!idney or circulatory pro#lems heat stress is anadded strain on your #ody which in severe situationmay precipitate serious episodes o acute pro#lems



PredisposinPredisposing Factors:g Factors:

very small #ody si&eoverweight

over 89 years old theolder the more sensitiveprevious heat illnessheart disease

high #lood pressuredia#etesinactivityphysical activity

+sooner or later,e-re all vulnera le +



++ ,ith all these,ith all thesevulnera ilities ,ho typicallyvulnera ilities ,ho typically

gets heat stroke.gets heat stroke.

young physically fit males

and sick older people



S S

"oolingevaporation

o! s,eat

Heat/alance

H

H

&nternalHeat sources

muscle activity

H

E#ternalHeat sources

hot ,eatheradiant heat sources



E#ternal heatE#ternal heat

sourcesourcecontrolscontrols

• At the source

: 0eplace/isolate heat producingprocesses: ;loc! radiant heat with #arriers shade

• Along the path: *solate wor!er rom heat: 1ir condition wor!place #ooth: -apture hot air with e<haust ventilation

E#ternalHeat sources

hot ,eatherradiant heat sources

H



&nternal&nternalsourcesource

controls:controls:• At the source

: 0educe wor!load• improve ergonomics"• provide assistance"• increase relie time• slow down

: Provide ade2uate water: 1ctively cool #ody: Gradually acclimati&e

: =nsure good nutrition and rest

&nternalHeat sourcesmuscle activity

H

H



Promoting "oolingPromoting "ooling• Wear loose clothes that

allow sweat to evaporateeasily cotton

• ,a!e internal heat sourcesinto account when usingany personal protectiveclothing that prevents

sweat rom evaporating• Wash clothes regularly and

maintain good personalhygiene

S

S

"ooling

evaporation o! s,eat



/ody "hanges due to/ody "hanges due to

Acclimati0ation:Acclimati0ation:

• Gradually build up your ability to handle heat(increase exposure time by an hour/day)

• When your body gets used to the heat(acclimatized) your sweating #ecomes more$e6cient% more sweat" 2uic!er #ut withless salt in sweat

• blood flow to skin is reduced; more blood isa ailable to muscles

• heart rate more sta#le" heart sto!e olumeincreases and blood olume increases



See your doctorSee your doctor

• * you are having trou#legetting used to the heat

or• * you have 2uestions

a#out how heat may

afect a medical conditionyou have

> see your doctor$



Drink Water

!cclimatization does notdecrease your body"s need for

water#

$rink plenty of water%



%hat to%hat todrink:drink:

• =lectrolyte drin!s e.g. Gatorade are usually

not needed or typical 3orth 1merican dietcan #e used or ?rst aid or cramps .

• Stay away rom cafeinated car#onated" dietdrin!s and alcohol as they ta!e water out oyour #ody.

• Water is the #est 7uices and/or noncafeinesport drin!s are also good 7uices containenergy restoring glucose .



Dehydration

&o pre ent

dehydration' takead antage of

scheduled waterbreaks%



Ho, 1uch %aterHo, 1uch %ater

is Enough.is Enough.• @ore than you want 7ust to satis y your thirst

• Sources o water areAB. Fluids ' B cup or C o& D E89 m) every E9 minE. Foods ' ruit veggies are 9 water

• Why B9'BIJ-K > to ma<imi&e the amountyou drin! not too cold" not lu!e warm

• Loes it need to #e delivered to the wor!stationK > depends on wor!place logistics >



2ehydration2ehydration+uid loss timeM efect symptoms

M timing may vary #ased on intensity o wor!and heat/humidity

9.NI ) B hr unnoticed at B.I weight loss youare considered dehydrated

B.I ) E'O hrs loss o endurance" start to eelthirsty" eel hot" uncom orta#le

E.EI ) O'8 hrs loss o strength" loss o energy"moderate discom ort

O ) 8'I hrs cramps" headaches" e<tremediscom ort

O.I'8 ) I' hrs heat e<haustion" nausea" aint

IQ ) NQ hrs heat stro!e" collapse"

unconsciousness

taken from: OH&S Canada Volume 69, Num er !, page !", #ay "$$$



3ou can and should replaceessential elements lost durings,eating4

Eat a alanced dietrather than taking saltta lets or drinking

e#pensive sportsdrinks5

Eat Healthy



"ooler Fans"ooler Fans

• Purpose o a cooling an is primarily toincrease the rate o sweat evaporation #ut it also cools #y convection i the airis cooler than the s!in

• Fan coolers may inter!ere ,ith locale#haust ventilation or contaminantcontrol" there ore #e care ul in wherethey are placed and how they are

pointed



"ooler Fans"ooler Fans (limitations(limitations

• * the relative humidity isover 6789 ; the an will nolonger increase evaporation

o sweat• ,he closer the air

temperature is to skintemperature OI'O J- the

less efective the cooling: i the air temperature e<ceedss!in temperature then the anmay even heat up the ody

li!e a convection oven 5



Personal Protective Equipment Personal Protective Equipment

pecial cooling ests orice ests ha e beende eloped to wear underchemical resistant suits

use on a case #y case #asis :they may not wor! oreveryone



%hat-s the *a,.%hat-s the *a,.

<eneral 2uty "lause:: EI E h $> an employer shall" > ta!e every

precaution reasona#le in the circumstances or theprotection o a wor!er % ta!en romA RH S 1ct

1O* Heath and Sa!ety <uidelines: HeatStress:: $,he @R) uses the ,) s T or Heat Stress pu#lished

#y the 1-G*H%. ta!en romAhttpA//www.gov.on.ca/)1;/english/hs/guidelines/glUheat.html



B. clothing RV/ad7ustmentK

E/Oa. W;G,screening/ detailedaction limit

E/O#. W;G, screening/detailed T*= >

I. ?o 8speci@c controls

OO

8. heat strain evaluation ' heart rate ' core temperature

3ES 3ES

a ovea ove

elo,elo,

a ove or no dataa ove or no data

e#cessivee#cessive

OB OB

elo,elo,

C 6

A"<&HHeatStress)StrainT*= >

!eep monitoring

general control



%hat is a %/<T.%hat is a %/<T.

B. normal thermometer dry'#ul#E. wet'#ul# thermometer

• humidity

O. glo#e temperature• radiant heat

%% et // ul# << lo#e TTemp.



Screening %/<TScreening %/<T inin

J- J- ::,orkdemands:

light

moderate

heavy veryheavy

D ; ,ork4

( reaksincl5

C95

D5

C75

C95

not

allo,ed

not

allo,ed67; ,ork4C7; rest

C957D5

C 5CG5

C 5C657

notallo,e

d7 ; ,ork47 ; rest

CG57C5

C655

C757CG5

C 57C95

C7; ,ork4

67; rest

CG5

C57

CG5

D5

C95

57

C65

5Action *ev el

T*= >



Ho, to measure heat stressHo, to measure heat stressusing temperature Iusing temperature I

humidityhumidityB. Find a representative place

E. Find temperature and humidity onchart and read of the Humide<

O. ,a!e into account radiant heatadd EJ Humide< to measurementor ull sun

8. 3eed to ta!e clothing intoaccount add IJ Humide< oroveralls on top o summerclothes

H id # H t St RHumide# Heat Stress Response



Humide# Heat Stress ResponseHumide# Heat Stress ResponsePlanPlan

%emperature "9'C(elati)e Humidity 6$*

Humide+ -'C



"A=EAT (,arning $"A=EAT (,arning $

never ignore symptoms even i

measurements meetstandards5



%hy %orry A out%hy %orry A out

Heat Stress.Heat Stress.• Heat can kill$

• * glo al ,arming is happening"heat stress will #ecome moreimportant



August GJ C D: BimAugust GJ C D: Bim2ouglas %arner 2ied o!2ouglas %arner 2ied o!

Heat StrokeHeat Stroke • #a!ery wor!er was near the end o a BE

hour shi t on the I th day o a heat waver

• according to =nvironment -anada on1ugust " E99B outdoor temperature in;arrie is OO.8J-" and humidity was O9 sothe outdoor humide< was O J-

• i temperature in the #a!ery was estimatedto #e IEJ- and i the humidity inside wasB9 " then Humide< would have #een 7 K"



Remem erJ ,hen it-sRemem erJ ,hen it-s

hot:hot:H eed your ody$ ,atch !or

symptoms$

Ensure you-re drinking enough$

Ad?ust your activity level L slo,

do,n$Take clothing)PPE into account$

Documents

Heat Stress Train