If you are drenched from rain or perspiring heavily, you will lose body heat faster than you would under dry conditions. If you have to work outside in wet conditions, you should try to dress appropriately. Proper clothing includes rain gear, gloves, sturdy work boots, and headgear. About half of your body heat escapes through your head, so wearing a hat can slow down that process. If you or somebody else is suffering from hypothermia, it is important to treat it quickly.
Most people exercise or keep moving to stay warm if they are unable to get to a warm place.
You should remove wet clothing as soon as possible and replace with dry blankets or clothing. Don't use direct heat or hot water to warm the victim. Do not massage the skin. You should give the victim warm beverages, but not any alcohol or cigarettes because they restrict blood flow. When you work outdoors during the winter months, especially on rainy days, remember the potential for developing hypothermia.