FEMA suggests a minimum of 3.5 gallons of drinking water per person to last the two weeks. Humans can survive quite easily for two weeks without much food, but it's water that's important if people are going to stay underground for long periods of time.
So what do people need in a fallout shelter? Although we're used to eating food on a regular basis, storing lots of food in a fallout shelter isn't the biggest concern.
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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