![]() ![]() Most are equipped with radiation detection devices and battery-powered radios to stay informed. Although the amount of time it takes for radiation to disappear varies, from a few days to two weeks, most people take the "better safe than sorry" stance on this issue. Most government manuals recommend staying inside a fallout shelter for about two weeks. A minimum of 10 square feet per occupant is required by FEMA, along with a minimum of 6.5 feet of head room. Public shelters usually have enough room to carry at least 50 people, but they can be big enough to provide protection for hundreds. ![]() All public fallout shelters are marked with the universal sign for fallout shelters, which is a circle with three upside-down triangles inside (as seen in the first picture in this article). Eyerman/Time Life Pictures/Getty ImagesĪ public shelter can be any kind of public building, including hospitals, schools and police stations.
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