After the 2011 tornadoes in the Southeast US, many communities built above-ground shelters (think "bunker"), with the downside being going any distance to a she

After the 2011 tornadoes in the Southeast US, many communities built above-ground shelters (think "bunker"), with the downside being going any distance to a shelter is likely to be more dangerous than staying where you are. Also, many homeowners bought smaller above-ground shelters (think "steel pill-box").