For millennia, the Inuit have been using quuliit (seal oil lamps) such as this one to heat
their igloos.
bigger the fire you have (provided you have the fuel), the more likely it will
keep going, even if you get hit with rain or snow, go to sleep, or need to
leave it for a while to carry out other survival tasks.
Should you decide to leave your fire for a few hours, first, make sure
it’s not in an especially windy area, or else you’ll burn through your fuel
too quickly and also increase the risk of starting a forest fire. Try to find a
location that affords at least a little protection for your fire, whether near
rocks or in a place that offers natural protection from the elements. The
exception, of course, is in the case of a signal fire, which should be out in
the open and as visible as possible.
How long you leave your fire largely depends on how much fuel you
have to add to it. If you’ve got plenty of fuel and you have made a big fire,
you should be able to stay away for as long as eight hours and come back
Fire (^) | 109