Prolonged exposure to freezing or cold temperatures may cause serious health problems such as trench foot, frostbite and hypothermia. In extreme cases, including cold water immersion, exposure can lead to death. Danger signs include uncontrolled shivering, slurred speech, clumsy movements, fatigue and confused behavior. If these signs are observed, call for emergency help.

 OSHA's Cold Stress Card provides a reference guide and recommendations to combat and prevent many illnesses and injuries.

Click here: https://www.osha.gov/Publications/osha3156.pdf