A portable survival shelter that includes a body having a generally elongated shape and a protective outer shell structure, a sealable entrance on the top of the body, and a base upon which the body is formed. The body defines a sealable survival chamber that is large enough to hold one or more persons and strong enough to withstand the impact of falling tree limbs, flying debris, or the like. The shelter is preferably configured with ballast to float in water in an upright orientation and constructed with an exterior surface substantially free from protruding snags. The shelter is preferably of a size that fits within a conventional automobile garage, and preferably incorporates forklift pockets for moving the shelter from place to place with a forklift or recessed pad eyes for lifting the shelter with a crane or helicopter.