Avoiding Cold Stress

Winter is in full force and working in cold weather can be brutal. Even if you have the proper protection, exposing yourself to extreme weather conditions can have serious short and long-term effects. Cold stress occurs by driving down skin temperature, and eventually the internal body temperature. When your body is unable to warm itself back up, serious cold-related injuries and illnesses can happen. 

Working in the cold requires the proper preparation, so get to know these hazards so they don’t get to know you. 

Cold Weather Hazards 

Stiffness – Your range of motion is one of the first things affected by cold weather. Your body tries to increase the temperature of the core of your body, so it pumps blood away from your limbs. This can hinder flexibility, dexterity, and agility in the hands and feet, which limits a worker’s ability to grip or carry objects. 

If you are starting to notice stiffness, take a break. Move into a warm area. Add extra layers of warm clothing and drink warm fluids. 

Frostbite – Common on the fingers, toes, nose, ears, cheeks, and chin, frostbite can occur at or below 32°F (0°C), or during above freezing temperatures with wind chills below 32°F (0°C). At this temperature, blood vessels close to the skin start to constrict, reducing blood flow to your extremities to dangerously low levels, leading to the eventual freezing and death of skin tissue in the affected areas. For early signs of frostbite, the skin will appear white or red and can feel hard or stiff (not ideal for working safely). 

For any noticeable frostbite symptoms, always call 911. Move into a warm area as soon as possible and do not try to rewarm the area unless directed by medical personnel. Avoid rubbing or massaging the area or using any type of heating element (such as a heating pad or hot water), as this could cause more damage to the affected area. The key is to slowly bring the temperature of the affected area to normal body temperature (about 98.2°F or 37°C). 

Hypothermia – This is a condition in which core temperature drops below the required temperature for normal metabolism and body functions. Symptoms vary depending on the level of hypothermia; the four levels are mild, moderate, severe, and critical. 

The first sign is severe shivering, followed by drowsiness. Irritability, confusion, and loss of coordination are more severe signs; with slurred speech, unconsciousness and heart failure being the most severe dangers. Being mindful of these symptoms can be critical. 

For any noticeable hypothermia symptoms, always call 911 immediately. If hypothermia is mild (core body temperature 90-95 degrees), start by moving the victim to a warm, dry area. Remove any wet clothing, replace with warm, dry clothes and wrap in blankets. Have them drink something warm and sweet. Avoid suppressing shivering, massaging the extremities, or placing in a warm bath or shower. 

If the hypothermia is more moderate to severe (core body temperature below 90 degrees), be sure to handle the victim gently, and check for airway obstructions. If pulse and breathing are stabilized, gently remove wet clothing and replace with dry, layered blankets. Begin rewarming victim with extra clothing, warm blankets, and even electric blankets or heating pads on the torso, armpits, and neck (be mindful of the temperature, as these can burn). Avoid suppressing shivering, giving anything by mouth, massaging the victim, or immersing in warm water. Even if the victim appears lifeless, continue first aid treatment. The body can sometimes survive for hours without signs of life at very low body temperatures. 

How to avoid succumbing to the elements 

As serious as these hazards are, they are avoidable if you are properly prepared. If you must work in cold environments, be sure you know how to avoid succumbing to any of these cold weather hazards through the preparations below. 

  • Training – This should be given so workers understand the signs of cold stress and how to avoid the hazards. 
  • Engineering controls – These can be effective in reducing the risk of cold stress, such as radiant heaters or structures to shield work areas from drafts or wind to reduce wind chill. 
  • Safe work practices – Implement practices such as having warm liquids available to workers; limiting heavy work during particularly cold, wet, or windy weather; or ensuring frequent breaks are taken when workers are exposed to the elements. 
  • Dress properly – Wearing the proper clothing and PPE is extremely important. 
  • Clothing: Ensure your workers are prepared by donning several layers of warm clothing and making sure the head, feet, and hands are properly covered and protected. See what kind of clothing insulation you might need 
  • Gloves: Insulated gloves are best, depending on how low temperature levels get in your work environment. Even better is using hand PPE that is insulated, lined for waterproofing, and offers the protection you need to do your job while maintaining dexterity. See what cold weather liners can do for you 
  • Boots: Ensure work boots are suitable for the job, such as waterproof, water-resistant, and lined. 

And remember, always keep on the lookout for cold stress symptoms and take breaks when needed.

Stay safe out there! 

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