Hypothermia, frostbite & trench foot are all illnesses and injuries caused by cold stress.
Wear appropriate clothing.
Wear several layers of loose clothing for better insulation. Some clothing may restrict movement, which could be dangerous.
Make sure to protect the ears, face, hands, and feet.
Boots should be waterproof and insulated. ** Wear a hat. Hats reduce body heat escaping from your head. **
Move into warm locations during breaks.
Carry extra socks, gloves, hat, jacket, clothes, and blankets.
Include a thermometer and chemical hot packs in your first aid kit.
Avoid touching cold metal surfaces with bare skin.
Monitor your physical condition and that of your coworkers