alert - warning

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Zone B and X (Shaded)

Area of moderate flood hazard, usually the area between the limits of the 100‐ year and 500‐year floods. B Zones are also used to designate base floodplains of lesser hazards, such as areas protected by levees from 100‐year flood, or shallow flooding areas with average depths of less than one foot or drainage areas less than 1 square mile.