EVEN SUPREMELY WELL-BUILT structures are vulnerable in the face of hurricanes and tornadoes. If a home is located in the storm-prone area, The Federal Emergency Management Agency (FEMA) recommends storm shelters—FEMA calls them “safe rooms”—be designed into new homes or retrofitted into existing ones. Safe rooms can be located in basements, garages or in interior rooms of new homes or small business buildings. Exterior safe rooms can either be buried underground or attached to an existing building.
One example of a simple, low-cost shelter is constructed from cement-filled, foam-formed walls that have been reinforced with steel rebar. These can be designed and built into new homes or retrofitted inside or outside existing homes.
FEMA provides a number of detailed designs through its online library: http://tinyurl.com/lxykjq3