If you are surrounded by snow in the winter, build an igloo type of shelter. You can dig down into the snow and build up the walls around you. Make certain to leave holes for ventilation that won’t be blocked by any falling snow, so you won’t suffocate. You really don’t need to be on your own when it is snowing, and a homeless or youth shelter or 24-hour public place is always a better choice, but in an emergency this can be a good shelter.