Winter work safety in the Midwest
Midwest winters are known for biting cold, chilling winds, ice, snow, and sleet. For those in agriculture, especially those working with livestock, the work doesn’t stop in the winter – making cold conditions not only a challenge but a serious hazard on the farm. While working through the winter’s chill may be tempting; cold, wet, and windy conditions can be dangerous, potentially leading to severe illnesses, injuries, or death.

 
Although we cannot stop the winter chill, we can practice safety to better protect ourselves. The proper precautions can help prevent and minimize the risk of cold stress among you and your workers.

 Extreme cold weather is a dangerous situation that can bring on health emergencies in susceptible people, such as those without shelter, outdoor workers, and those who work in an area that is poorly insulated or without heat. What constitutes cold stress and its effects can vary across different areas of the country. In regions relatively unaccustomed to winter weather, near freezing temperatures are considered factors for cold stress. Whenever temperatures drop decidedly below normal and as wind speed increases, heat can more rapidly leave your body. These weather-related conditions may lead to serious health problems.

 Cold stress occurs by driving down the skin temperature, and eventually the internal body temperature. When the body is unable to warm itself, serious cold-related illnesses and injuries may occur, and permanent tissue damage and death may result.

 Four factors contribute to cold stress: cold temperatures, high or cold wind, dampness and cold water. A cold environment forces the body to work harder to maintain its core temperature. Cold air, water, and snow all draw heat from the body. So, while it is obvious that below freezing conditions combined with inadequate clothing could bring about cold stress, it is important to understand that it can also be brought about by temperatures in the 50's coupled with rain and/or wind.

 It is important for employers to know the wind chill temperature so that they can gauge workers’ exposure risk better and plan how to safely do the work. It is also important to monitor workers’ physical condition during tasks, especially new workers who may not be used to working in the cold, or workers returning after spending some time away from work.

 The National Oceanic and Atmospheric Administration (NOAA) Weather Radio is a nationwide network of radio stations broadcasting continuous weather information from the nearest NWS office. It will give information when wind chill conditions reach critical thresholds. A Wind Chill Warning is issued when wind chill temperatures are life threatening. A Wind Chill Advisory is issued when wind chill temperatures are potentially hazardous.

 Environmental cold can affect any human or animal exposed to cold air temperatures and puts workers at risk of cold stress. As wind speed increases, it causes the cold air temperature to feel

 even colder, increasing the risk of cold stress to those working outdoors whether hunting and fishing, snow cleanup crews, construction workers, or farmers.

 Risk factors for cold stress include:

 ● Wetness/dampness, dressing improperly, and exhaustion

 ● Predisposing health conditions such as hypertension, hypothyroidism, and diabetes

 ● Poor physical conditioning

 Trench foot is a non-freezing injury of the feet caused by prolonged exposure to wet and cold conditions. It can occur in temperatures as high as 60°F if feet are constantly wet. Injury occurs because wet feet lose heat 25-times faster than dry feet.

 Frostbite is caused by the freezing of the skin and tissues. Frostbite can cause permanent damage to the body, and in severe cases can lead to amputation. The risk of frostbite is increased in people with reduced blood circulation and among people who are not dressed properly for extremely cold temperatures.

 Hypothermia occurs when the normal body temperature (98.6°F) drops to less than 95°F. Exposure to cold temperatures causes the body to lose heat faster than it can be produced. Prolonged exposure to cold will eventually use up the body’s stored energy. The result is hypothermia, or abnormally low body temperature. Hypothermia is most likely at very cold temperatures, but it can occur even at cool temperatures (above 40°F) if a person becomes chilled from rain, sweat, or immersion in cold water.

 If first aid for cold stressors becomes necessary, do the following:

 ● Call 911 immediately in an emergency:

 ● Move the worker to a warm, dry area.

 ● Remove any wet clothing and replace it with dry clothing. Wrap the entire body (including

 the head and neck) in layers of blankets; and with a vapor barrier (e.g. tarp, garbage bag) Do not cover the face. If medical help is more than 30 minutes away:

 ● Give warm sweetened drinks if alert (no alcohol), to help increase the body temperature. Never try to give a drink to an unconscious person.

 ● Place warm bottles or hot packs in the armpits, sides of the chest, and groin. Call 911 for additional rewarming instructions.

 As always, the best first aid is prevention. Respect the cold and wet, especially in combination. Take frequent warming breaks, never work alone, carry extra clothing, and have communication devices handy.


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