In an emergency situation, garbage bags can be used to create improvised clothing or shelters to help keep you warm. Here are a few ideas:

1. Use garbage bags to create a raincoat or poncho: Cut a hole in the center of a large garbage bag and pull it over your head. This will provide basic protection from the rain and wind.

2. Use garbage bags to create improvised boots: Cut the bottom off of a pair of garbage bags and slip them over your shoes. This will help to keep your feet dry and warm in wet or snowy conditions.

3. Use garbage bags to create an improvised sleeping bag: Lay a large garbage bag on the ground and fill it with leaves, grass, or other insulating materials. Then, crawl inside and use another garbage bag to cover yourself. This will provide basic insulation and protection from the elements.

4. Use garbage bags to create a makeshift shelter: Tie garbage bags together to create a long, narrow "tent" shape. Then, drape the tent over a frame made from sticks or other materials to create a basic shelter.

Keep in mind that these are only temporary solutions and are not intended to replace proper emergency gear. However, they can provide some basic protection and warmth in a pinch. Always be prepared with proper emergency supplies and a plan in case of an emergency.