Hundred Year Flood Zone

Last updated: October 20, 2017

What Does Hundred Year Flood Zone Mean?

The Hundred Year Flood Zone is the map that identifies areas in the United States that are most likely to be flooded. Those who own property in areas identified as being at risk of flooding are advised to purchase flood insurance.


Insuranceopedia Explains Hundred Year Flood Zone

The Hundred Year Flood Zone's name refers to the measure of probability that an area will be affected by a flood within one hundred years.

The mapping is not always based on past incidents of flooding but may also take into account an area's geographical features, such as its proximity to bodies of water.


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