bushfire.? I have been shot down on other forums with this idea as most say you need an oxygen supply.Considering one family did survive the fires in their cellar but also said that the tin they covered the entrance with glowed red tells me this is better than no cellar and then a little girl survived by crawling down a wombat hole ?- no oxygen there.But enough to suffice the main fire passing.What a way of recycling old sea containers.