Cold weather can create serious safety risks for employees who work outdoors or in cold indoor environments. Construction sites, warehouses, loading areas, and unheated workspaces can expose workers to conditions that increase the risk of cold stress.
Cold stress occurs when the body loses heat faster than it can replace it. Without appropriate precautions, workers may develop cold related illnesses and injuries that affect their health, alertness, and ability to perform their jobs safely.
Employers can help protect their teams by recognizing cold weather hazards, providing appropriate protective equipment, and establishing procedures for working safely in cold conditions.
What Is Cold Stress?
Cold stress occurs when exposure to cold temperatures, wind, or wet conditions causes the body to lose heat. The level of risk depends on several factors, including temperature, wind speed, clothing, physical activity, and how long a worker remains exposed.
Workers do not need to be in extreme winter conditions to experience cold related health problems. Rain, sweat, wet clothing, and cold water can increase heat loss, even when temperatures are above freezing.
Employees who work outdoors, in refrigerated environments, or in poorly heated buildings should understand the risks and know when to seek help.
Common Types of Cold Stress
Recognizing the different types of cold related illness can help workers and supervisors respond appropriately.
Hypothermia
Hypothermia occurs when the body’s temperature drops to a dangerously low level because heat is lost faster than it can be produced. It can affect thinking, coordination, and physical performance.
Warning signs include:
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Shivering and fatigue
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Difficulty coordinating movements
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Confusion or disorientation
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Slowed breathing or loss of consciousness in severe cases
Suspected hypothermia requires prompt medical attention. Move the affected worker to a warm, sheltered location, remove wet clothing when possible, and follow emergency medical guidance.
Frostbite
Frostbite occurs when body tissue freezes, most often affecting the fingers, toes, ears, nose, and cheeks.
Possible symptoms include numbness, tingling, aching, and pale or waxy skin. Severe frostbite can cause lasting tissue damage.
Workers with suspected frostbite should receive medical attention. Protect the affected area, avoid rubbing or massaging it, and follow medical guidance for treatment.
Trench Foot
Trench foot, also called immersion foot, can develop when feet remain cold and wet for prolonged periods. It can occur even when temperatures are above freezing.
Symptoms may include numbness, tingling, swelling, pain, and changes in skin color. Workers should keep their feet dry, change wet socks when possible, and seek medical attention if symptoms develop.
Chilblains
Chilblains are inflammatory skin reactions associated with repeated exposure to cold, damp conditions. They may cause redness, itching, swelling, or blistering, commonly on fingers, toes, ears, and cheeks.
Workers who develop persistent or severe symptoms should seek medical advice.
How Employers Can Prevent Cold Stress at Work
Employers can take practical steps to reduce cold weather risks and help employees work more safely.
1. Provide Appropriate Protective Clothing
Workers should have clothing suited to the temperature, wind, moisture, and physical demands of their jobs.
Depending on the work environment, protective clothing may include:
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Multiple layers of insulating clothing
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Wind resistant and waterproof outer layers
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Insulated gloves and appropriate head coverings
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Insulated, waterproof footwear
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Dry replacement clothing, socks, and gloves
Clothing should allow workers to move safely while providing adequate insulation. Wet clothing should be replaced as soon as practical.
2. Schedule Breaks in Warm Areas
Frequent breaks in warm, dry, sheltered areas give workers an opportunity to warm up and change wet clothing.
Employers should consider the weather conditions, workload, and duration of exposure when planning work and rest schedules. Where practical, outdoor tasks can be scheduled during warmer parts of the day.
3. Train Workers to Recognize Warning Signs
Employees should know the symptoms of cold stress, understand how to protect themselves, and recognize when a coworker may need help.
Training should explain how to dress appropriately, report unsafe conditions, and respond when someone develops symptoms. Workers should also understand that confusion or impaired coordination can make it difficult for an affected person to recognize their own condition.
4. Monitor Conditions and Check on Employees
Supervisors should monitor weather conditions and consider temperature, wind, moisture, and the length of time employees spend in cold environments.
A buddy system can help workers recognize warning signs in one another. Regular check-ins are especially important when employees work alone, perform physically demanding tasks, or have prolonged exposure to cold.
5. Establish Clear Emergency Procedures
Employees should know how to report cold related symptoms and contact emergency assistance when needed.
If a worker shows signs of a serious cold related illness, stop the work activity, move the person to a sheltered area if it is safe to do so, and seek medical assistance. Do not delay emergency care when symptoms suggest hypothermia or severe frostbite.
Which Workplaces Should Be Concerned About Cold Stress?
Cold stress prevention is important across a range of industries and work environments, including:
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Construction: Employees may be exposed to wind, rain, cold surfaces, and changing weather throughout the workday.
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Warehousing and distribution: Workers may spend time in loading areas, unheated buildings, or refrigerated storage environments.
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Transportation and logistics: Drivers and loading crews may face prolonged outdoor exposure while moving goods.
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Manufacturing: Employees working near open loading bays or in temperature controlled facilities may encounter cold conditions.
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Outdoor maintenance: Groundskeeping, cleanup, and other outdoor tasks can expose workers to cold and wet weather.
Businesses can explore LaborWorks locations in Colorado to learn more about staffing support in that market.
Make Workplace Safety Part of Every Workday
Cold stress prevention requires preparation, communication, and attention to changing conditions. Employers should provide appropriate protective equipment, schedule warming breaks, train employees to recognize symptoms, and establish clear procedures for responding to cold related illnesses.
LaborWorks understands the importance of workplace safety when connecting businesses with workers. Employers can explore our staffing services for businesses to discuss their workforce needs and the requirements of their assignments.
For additional workplace safety guidance, read our article on workplace safety practices.
Frequently Asked Questions
What temperature causes cold stress at work?
There is no single temperature at which all workers develop cold stress. Risk depends on factors such as wind, moisture, clothing, activity level, and exposure duration. Cold related illness can occur even in relatively mild temperatures when workers become wet or chilled.
What are the early warning signs of cold stress?
Early warning signs may include shivering, fatigue, numbness, tingling, and reduced coordination. Confusion, severe drowsiness, or loss of consciousness may indicate a medical emergency.
How can employers reduce cold stress risks?
Employers can provide appropriate protective clothing, schedule breaks in warm and dry areas, monitor weather conditions, train employees, and use buddy systems to identify warning signs.
Can workers experience cold stress indoors?
Yes. Employees working in refrigerated facilities, cold storage areas, or poorly heated buildings may be at risk, especially when exposure is prolonged or clothing becomes wet.
What should a worker do if a coworker shows signs of hypothermia?
Seek emergency medical assistance, move the affected worker to a warm and sheltered location if safe, remove wet clothing when possible, and follow medical instructions. Do not leave the person unattended while waiting for help.