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Dangerous thinking in hot weather
How body heat effects
decision making
and safety.
Presentation by: Pauline Sanders | Director
Red Dirt International Pty Ltd
Perth WA 6000 Australia
+61 8 6102-7719 Office
...
Compound safety issues
Repeated heat exposure may
 Weaken internal organs
 Impact neurological system
 Impair reaction ...
During heat exposure
Autonomic nervous reaction
causes
 Heart rate increases
 Blood vessels dilate
Hot, hot and hotter
Aggravating environmental factors
 Exhaust, dust and chemicals
 Noise and vibration
 Heat radiated ...
Heat strain and the brain
Working for extended periods of time
in hot conditions may
 Impair short term verbal
and numeri...
Think it’s hot?
NASA
(National Aeronautics
and Space Administration)
... when air temperature is over 95
degrees, an indiv...
Some (don’t) like it hot...
The Effects
of Thermal Strain
on Cognition
By the Combatant Protection and Nutrition Branch
Ae...
Hot brain drain
Body core
temperature
during test
Hot brain drain
Where activity
was measured
Hot brain drain
Intensity of brain
activity during 10
minute task test
Hot brain drain
How rest period
effects brain
Intermittent dehydration
Compound stress from sweating &
changes in hydration effects
 Kidneys
 Liver
 Heart
 Digestiv...
Sleep problems
Heat exposure may disrupt healthy
sleep cycles due to
 Repeated changes
in electrolyte balance
 Recurring...
Hot and bothered
Staff working in hot conditions may
‘do stupid things’ and ‘have a bad
attitude’ because
 Short term slo...
Cooling comfort
Reduce safety risks in hot climates
by improving thermal comfort
 Cooling neck, head and hands
 Cooling ...
Copyright
You are free to reuse or present any
content contained in this document. By
using this document, you agree to ke...
Source Materials
Would you like the details?
Please contact Red Dirt Workwear
for links to sources including
medical, mili...
Presentation by: Pauline Sanders | Director
Red Dirt International Pty Ltd
Perth WA 6000 Australia
+61 8 6102-7719 Office
...
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How body heat effects decision making and safety

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Hot & Bothered. Dangerous thinking in hot weather.

How body heat effects decision making and safety. A summary of medical, military and science research into the short-term and long-term effects of working in hot environments.

A quick sample of data showing what is happening to the brain even when no heat-related illnesses are occurring. High-level observations about decision making and safety risks to healthy workers exposed to hot conditions during work.

Published in: Technology, Business
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How body heat effects decision making and safety

  1. 1. Dangerous thinking in hot weather How body heat effects decision making and safety.
  2. 2. Presentation by: Pauline Sanders | Director Red Dirt International Pty Ltd Perth WA 6000 Australia +61 8 6102-7719 Office SKYPE reddirtworkwear pauline@reddirtworkwear.com.au www.reddirtworkwear.com.au
  3. 3. Compound safety issues Repeated heat exposure may  Weaken internal organs  Impact neurological system  Impair reaction time  Increase chances of accidents
  4. 4. During heat exposure Autonomic nervous reaction causes  Heart rate increases  Blood vessels dilate
  5. 5. Hot, hot and hotter Aggravating environmental factors  Exhaust, dust and chemicals  Noise and vibration  Heat radiated from machinery  Protective equipment
  6. 6. Heat strain and the brain Working for extended periods of time in hot conditions may  Impair short term verbal and numeric memory  Increase decision making time  Result in poor decisions  Slow reaction time  Reduce awareness
  7. 7. Think it’s hot? NASA (National Aeronautics and Space Administration) ... when air temperature is over 95 degrees, an individual can make 60 mistakes an hour ...
  8. 8. Some (don’t) like it hot... The Effects of Thermal Strain on Cognition By the Combatant Protection and Nutrition Branch Aeronautical and Maritime Research Laboratory and Brain Sciences Institute, Swinburne University of Technology, Victoria (Australia, Oct 2000)
  9. 9. Hot brain drain Body core temperature during test
  10. 10. Hot brain drain Where activity was measured
  11. 11. Hot brain drain Intensity of brain activity during 10 minute task test
  12. 12. Hot brain drain How rest period effects brain
  13. 13. Intermittent dehydration Compound stress from sweating & changes in hydration effects  Kidneys  Liver  Heart  Digestive system  Nervous system
  14. 14. Sleep problems Heat exposure may disrupt healthy sleep cycles due to  Repeated changes in electrolyte balance  Recurring nervous system fatigue
  15. 15. Hot and bothered Staff working in hot conditions may ‘do stupid things’ and ‘have a bad attitude’ because  Short term slowing of brain  Strain on mental processes  Recurring insufficient sleep
  16. 16. Cooling comfort Reduce safety risks in hot climates by improving thermal comfort  Cooling neck, head and hands  Cooling while working  Recurring retreats to cooler locations throughout shifts
  17. 17. Copyright You are free to reuse or present any content contained in this document. By using this document, you agree to keep the Red Dirt and Pauline Sanders byline unaltered. If you edit the content in this document, add your name as the editor. This work by Red Dirt Workwear and Pauline Sanders is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
  18. 18. Source Materials Would you like the details? Please contact Red Dirt Workwear for links to sources including medical, military and science research. - Pauline Sanders, Director
  19. 19. Presentation by: Pauline Sanders | Director Red Dirt International Pty Ltd Perth WA 6000 Australia +61 8 6102-7719 Office SKYPE reddirtworkwear pauline@reddirtworkwear.com.au www.reddirtworkwear.com.au

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