Administrative controls, such as a cold stress prevention program, can reduce the risk of injuries associated with working in a cold environment. Working in cold temperatures and high winds for an extended period can result in cold-related injuries, particularly if the skin is wet. Implementing a comprehensive cold stress prevention program can have a positive impact on safety and productivity. Ensuring adequate maintenance of walking and working surfaces, hydration, clothing and equipment, and warming are part of a cold stress prevention program and help to lower risks for cold-related injuries.

The following information was derived from multiple sources including the American Conference of Governmental Industrial Hygienists (ACGIH) 2013 TLVs and BEIs, the Occupational Health and Safety Administration’s (OSHA) Cold Stress Guide, OSHA’s web page on Winter Weather, and the United States Army Corps of Engineers Safety and Health Requirements Manual (EM 385-1-1).

A cold stress prevention program should include:

1) the name of the individual who will be responsible for ensuring the program is in place (e.g., supervisor, foreman, safety coordinator, crew leader, etc.),

2) information on cold-related hazards and the workers at risk,

3) methods to protect workers and the resources required (e.g. warm clothing, hand and foot warmers, salt, ice melt products, access to warming areas, etc.),

4) training for workers and supervisors on how to identify, prevent, and respond to cold-related injuries,

5) monitoring workers for sign and symptoms of cold-related injuries, and

6) plans for aiding workers suffering from cold-related injuries, including emergency preparations for possible frostbite and hypothermia cases.

Specific actions to be taken before work begins:

• Check the extended weather forecast. Call or visit the National Weather Service at http://www.weather.gov/ to plan for upcoming work and prior to the start of each workday to ensure that adequate plans are in place to protect workers. You can also receive weather alerts on your cell phone or computer through http://weather.weatherbug.com/?stick=1 or the National Weather Service at http://www.erh.noaa.gov/er/iln/WEA/wireless_emergency_alert.php.
• Conduct worker and supervisor training on how to prevent and identify cold-related injuries, and provide regular reminders.
• If possible, schedule work activities during warmer times of the day and heat the work area.
• Make sure all workers know where to go for warmth. Locate warming areas for breaks as close as practical to where the work is being performed.
• Ensure that an emergency response plan is in place and identifies who knows first-aid, who will respond, who will stay with the injured person, steps for handling a worker with a cold-related injury, a map of the site, directions for emergency medical services, and how to address potential language barriers. Hypothermia, a core body temperature of less than 95°F, can pose an imminent threat to life and health, so on remote or difficult to access construction sites the plan should address air evacuation or rapid ambulance access.

Specific actions to be completed during work:

• Identify the quantity of sweet, warm, non-caffeinated liquids and the number of disposable cups that will be needed for the shift. Remind workers to drink warm liquids to stay hydrated and keep their core body temperatures up.
• Increase the frequency of rest breaks in warming shelters shielded from environmental conditions.
• Avoid fuel burning heaters, commonly referred to as “salamanders” if at all possible because of potentially deadly carbon monoxide build-up, particularly in enclosed spaces. If unavoidable, use small, inexpensive personal carbon monoxide monitors or area sampling to ensure workers are not being put at risk for carbon monoxide poisoning. Steps to control exposure are important because the gas is invisible, odorless and tasteless.
• Encourage workers to wear multiple layers of warm, breathable clothing and a wind proof outer layer.
• Keep a thermometer on the job, check it hourly and take preventive measures if there are unexpected changes in temperature and weather conditions.
• Maintain working and walking surfaces free of snow and ice by shoveling and applying sand, salt, and ice melt products. A variety of salt and ice melt products are available must be selected based on the temperature and intended use.
• Cover metal handles of tools with thermal insulating materials at temperatures below 30.2°F.
• If air temperature is 0°F or less, protect the hands with mittens and purchase tools designed to be used without taking off mittens.
• Supply eye protection for outdoor work in snow and ice-covered terrain to guard against ultraviolet light, glare and blowing ice crystals.
• Reduce the cooling effect of the wind with an engineering control as simple as a shield blocking the wind or by wearing an easily removable windbreak garment.
• Take special precautions to prevent soaking of clothes by liquids like gasoline, alcohol or cleaning fluids because of the increased risks of rapid cooling from evaporation.
• If heavy work is anticipated in the cold, ensure outer garments allow for easy ventilation to prevent wetting of inner layers by sweat.
• Provide special hand protection to maintain dexterity and prevent accidents. Below 60.8°F, special provisions for keeping hands warm must be provided if fine work will be done with bare hands for more than 10 to 20 minutes.

Weather Tracking and Forecasting Resources

National Weather Service

• Provides weather, water, and climate data, forecasts, maps and warnings for the protection of life and property and enhancement of the national economy.
• Provides recorded weather forecasts

WeatherBug by Earth Networks

• Provides weather forecasts, maps and warnings
• Provides applications for most smartphones and tablets
• Provides free, customizable widgets to use on your social media page, blog or website

La Crosse Alerts Wireless Remote Temperature and Humidity Monitor Alert System with Wet Temperature Probe

• Monitors temperature and humidity remotely and uploads data to a personal online account
• Wall hanging or free standing weather resistant case
• Data can be monitored by smartphone, tablet or computer
• Programmable to send alerts via text message or email if the temperature exceeds the user determined acceptable range
• 200 foot wireless range
• Powered by 2 AAA alkaline batteries
• Remote Sensor Dimensions: 5.23 inches by 0.76 inches by 1.44 inches

Working in a cold environment has been shown to reduce productivity in construction.  A comprehensive cold stress prevention program that ensures the use of protective clothing and equipment, warming breaks, and the maintenance of walking surfaces will reduce the risk of cold-related injuries and illnesses and provide greater productivity when working in a cold environment.

Engineering controls are always superior to administrative controls, such as a cold stress prevention program, and personal protective equipment, such as gloves and clothing. Engineering solutions to consider include shelters to protect workers from environmental conditions and portable electric fan heaters to warm the work or break area. Whenever possible, shelters with electric heaters inside should be used for warm up breaks when permanent heated structures are not available. Heated vehicle cabs may also be used in place of heated shelters.

Taylor Kingston and Michael R. Cooper - Aria Environmental, Inc.
Bruce Lippy - CPWR