heat stress uw-eau claire facilities management by: chaizong lor, fm safety coordinator
TRANSCRIPT
![Page 1: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/1.jpg)
Heat Stress
UW-Eau ClaireFacilities Management
By: Chaizong Lor, FM Safety Coordinator
![Page 2: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/2.jpg)
Heat Stress
• Training Objectives:– Background Factors– Heat Stress Hazards– Heat Stress Control Measures– Prevention of Heat Stress
![Page 3: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/3.jpg)
Heat Stress
• What is Heat Stress?– The combination of environmental and
physical work factors that constitute the total heat load imposed on your body’s cooling system.
![Page 4: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/4.jpg)
Heat Stress• Body’s Cooling System
– Blood is pumped close to skin for cooling reducing blood going to the brain and rest of your body.
– As temperatures rise, surface blood vessels get bigger and pulse rate goes up.
– As temperatures rise your body gains heat instead of losing it.
![Page 5: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/5.jpg)
Heat Stress• Body’s Cooling System Cont.
– Most people lose about a quart of sweat/hr. in extreme heat.
– This adds a strain to your circulatory system which now has to lower the amount of blood in your body.
![Page 6: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/6.jpg)
Heat Stress
![Page 7: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/7.jpg)
Heat Stress
– Mechanisms for heat loss/transfer• Evaporation
– The body transfers water vapor to the skin through pores and sweat glands
• Background – Heat Exchange
![Page 8: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/8.jpg)
Heat Stress• Background – Heat Exchange Cont.
– Mechanisms for heat loss/transfer• Conduction
– The direct transfer of heat from skin to the surrounding air as the ambient temp rises
• Convection– Air blowing over the skin e.g. use fan
• Radiation– The transfer of heat to or from surrounding objects
that are not in direct contact with the body
![Page 9: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/9.jpg)
LeastSevere
MostSevere
5
4
3
2
1
Heat Stress• Types of Heat Stress:
![Page 10: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/10.jpg)
Heat Stress• Heat Stress Hazards Cont.
– Heat Rash• Cause
– Hot humid environment– Skin is constantly wet from sweat– Sweat gland ducts become plugged
• Signs & Symptoms– Painful or itchy skin – Blister-like rash
• Treatment– Keep skin clean and dry– Stay cool with air conditioning– Fans and cool showers– Wear lightweight & loose-fitting clothing
• Prevention– Shower after working in hot environment– Keep skin clean and dry
![Page 11: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/11.jpg)
Heat Stress• Heat Stress Hazards Cont.
– Heat Fatigue• Cause
– Lack of acclimatization – Depletion of water and salt due to sweating
• Signs & Symptoms– Discomfort– Feeling of weakness and tiredness– Impaired performance of skilled tasks in heat– Inability to concentrate
• Treatment– No treatment necessary unless other signs of heat illness are
present• Prevention
– Acclimatization of workers for work in the heat
![Page 12: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/12.jpg)
Heat Stress• Heat Stress Hazards
– Heat Cramps• Cause
– Heavy sweating during hot work, drinking large amount of water without replacing salt loss
• Signs & Symptoms– Painful muscle spasms of arms, legs and stomach– Usually occur after heavy sweating and may begin towards the
end of the workday• Treatment
– Drink water, move to a cool shaded area– Spray the person with water and massage the cramp– Adequate salt intake at meals, try eating more fruits
• Prevention– Adequate salt intake with meals, and adequate water intake– Drink fluids regularly
![Page 13: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/13.jpg)
Heat Stress• Heat Stress Hazards Cont.
– Heat Exhaustion• Cause
– Dehydration causes blood volume to decrease– Inadequate salt and water intake causes a person’s body’s
cooling system to break down• Signs & Symptoms
– Fatigue, weakness, dizziness, faintness– Nausea, headache, heavy sweating– Low to normal blood pressure
• Treatment– Move person to a cool shaded area– Provide cool water to drink– Fan and spray with cool water
• Prevention– Acclimatize worker using a work rest– Drink plenty of water
![Page 14: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/14.jpg)
Heat Stress• Heat Stress Hazards Cont.
– Heat Stroke • Cause
– Partial or complete failure of sweating mechanism– Body cannot get rid of excess heat
• Sign & Symptoms– Hot dry skin, elevated body core temperature, confusion, loss of
consciousness» Fatal if treatment is delayed
• Treatment– Medical emergency– Move the victim to a cool shady area– Remove excess clothing– Spray the person with cool water
• Prevention– Monitor workers in sustained work in severe heat
» Drink plenty of water» Drink cool fluids that do not contain caffeine
![Page 15: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/15.jpg)
• Heat Stress Control Measures– Engineering Controls
• Reduction of Humidity: – Reduce the temperature and humidity through air
conditioning
• Provide air-conditioned rest areas.
• Ventilation and Air Conditioning: – Use of air-circulating fans– Better ventilation, to draw heat and steam away from
work areas
• Shielding between workers and heat sources
Heat Stress
![Page 16: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/16.jpg)
• Heat Stress Control Measures– Administrative Controls
• Changing the rate of work • Schedule hot jobs to cooler times of the day. • Increase the frequency and length of rest breaks if
possible• Encouraged employees to take a rest break should any
sign of heat stress or heat disorder develop. • Allow for slower-paced work during the hottest periods of
the day• Limiting duration of exposure time
– Rotate work activities
Heat Stress
![Page 17: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/17.jpg)
Heat Stress• Heat Stress Control Measures Cont.
– Protective Clothing• Light summer clothing should be worn to allow
free air movement and sweat evaporation. • Outside, wear light-colored clothing.
![Page 18: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/18.jpg)
Heat Stress• Prevention of Heat Stress
– Supervisor• Identify all hot work environments under his/her
authority• Ensure that employees have been trained in
hot working environments• Train workers to recognize signs & symptoms
of heat stress disorders and be prepared to give first aid if necessary.
• Avoid placing employees in hot work environments for extended time periods. Realize individual employees vary in their tolerance to heat stress conditions.
![Page 19: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/19.jpg)
Heat Stress• Prevention of Heat Stress
– Employees• Learn to recognize the symptoms of heat stress.
Change work location, taking adequate rest periods (in shade or cooler environment).
• Become familiar with the hazards associated with working in hot environments
• Use adequate fans for ventilation and cooling, especially when wearing personal protective equipment (PPE).
• Wear light colored, loose (unless working around equipment with moving parts) clothing.
• Keep shaded from direct heat where possible (e.g., wear a hat in direct sunlight).
• Drink plenty of water. In hot environments the body requires more water than it takes to satisfy thirst.
![Page 20: Heat Stress UW-Eau Claire Facilities Management By: Chaizong Lor, FM Safety Coordinator](https://reader036.vdocuments.us/reader036/viewer/2022072005/56649cd75503460f9499fb71/html5/thumbnails/20.jpg)
Any Questions
??Revision Dated: July 22nd, 2014