Hiking equipment
According to Tom Brown, the basic plan for survival is in the order of shelter (including clothing), water, fire, and food. Cody Lundin writes about the "Rule of 3s"; this relates to human survival without basics: three minutes without air, three hours without shelter, three days without water, or three weeks without food.
Bloodthirsty: One Nation Under Water
When Trey dies in a fire at Wolfinger Biomed, Virgil has reason to suspect that his brother was murdered. Having nothing left to live for, Virgil decides to investigate his brother's death, even if that means staying in New Orleans long enough to die in the coming hurricane. What he uncovers is an underground cabal of hemovores - "an organism that ingests blood as the main part of its diet." Unlike vampires, the hemovores in "Bloodthirsty" are not supernatural beings; they are humans with a mutated gene that controls longevity. Their bodies are in a constant state of repair, which deprives their cells of oxygen. In order to compensate for this loss, they must consume fresh (oxygenated) human blood daily or they will die.