Disclosed is a secure shelter for housing at least one individual for a sustained period during and after a natural disaster event. The shelter comprises a hardened enclosure having a securable hatch access door, an interior cabin and at least one user seat with a full safety harness. Each seat is preferably attached to the enclosure walls and may include an energy attenuating connection, while life supporting elements within the cabin include lighting, air filtration and intake means, communication and locating means, storage for supplies, as well as a power supply for sustained and independent operation. The device is preferably positioned within the basement of a home and tethered to a structural wall, or alternatively is affixed to the ground using structural footings when in use outside of a mobile or trailer home. The device protects users and maintains a comfortable, survivable environment during and after a natural disaster event.