In an emergency you need to protecting yourself from the elements in any environment.
This is when you need to setup an emergency shelter.
  Pre-made emergency shelter   There are many products in the market to help make basic shelters below are a list of some:  

• Poncho = this is a military solution it has two jobs waterproof coat andshelter.
  
• Bivi Bag = is a waterproof liner that you use to protect your Sleeping bag.
  
• Bivi Tent = is a small 1 man tent which can hold you and your rucksack.
  
• Storm Shelters = Mountain shelters are lightweightshelters that provide basic protection from the elements.
  

Natural survival shelter A natural shelter is a shelter created by nature which you can use to protect yourself from the elements this can be Cave, Hollow tree, Fallen trees, Overhang of a cliff face and a hole in the ground   Remember to check these kinds of shelters for wild life.
If this shelter has good ventilation then build a fire this will keep you warm and keep the wild life away.
  Building a Survival Shelter There are many books and DVDs on survival and they all cover Survival Shelter.
Listed below are the types of shelters that you may built.
 

• A Frame Shelter = is a common shelter to start you need acentre beam.
  Leaned up branches against the beam to form the roof.
  Onceyou have a good solid frame, start to cover it with grass, leaves orbranches.
  Always start with your roofing material at the bottom, and thenwork your way up.
  
• The Lean-to Shelter = is the simplest and fastest shelter to build.
  You need ahorizontal branch which can be tied between two trees or supported by twobranches crossed over.
  Then branches are leaned against the wind side tocreate an angled roof.
  The roof can than be covered with branches, grass, leavesor moss.
  
• Debris Shelter = To build a debris shelter you will need asturdy ridge-pole this will need to be propped on a sturdy log or rock, Whenthe ridge-pole is in place, you will need to place sticks close togetheralong both sides at an angle, leaving an opening for a door.
  At thisstage, it will look like a backbone with ribs.
  Cover the roof withbranches, grass, leaves or moss.
  Inner Insulation you will need to bepadded with the softest, driest debris.
  Pad it out top to bottom, goinside and compress it, this shelter will keep you warm.
  
• Snow Hole = Pick a suitable siteit helps if the site is level, and not under the path of a potentialavalanche.
  Make a pile of snow and compress it down as firmly as the coldair will harden your snow pile in a sort time, this process will reducethe risk of the cave from collapsing while you dig it out.
  Dig a tunnelinto the snow, sloping up slightly.
  Smooth roof inside to reduce the drips,so your equipment is not soaked.
  Make sleeping areas as needed.
  The higherthe sleeping platforms are, the better, as cold air will sink below the sleepingarea will keep you warm.
  Make a hole in the roof.
  Make sure it goes allthe way through.
  Without a ventilation hole, you could suffocate and lighta candle to see if the is oxygen.
  Block the entrance with a backpack tostay as warm as possible.