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Boundaries of 100-Year Flood Zones (Special Flood Hazard Area where new development is regulated and flood insurance is required, 1% annual chance of flood, 26% chance in 30-year period) ... 500-Year Flood Zones (Moderate Flood Hazard Area, .2% annual chance of flood, 6% chance in 30-year period) ... Areas Protected by Levee (from 1% annual chance of flood) ... and Floodway (to be kept free of encroachment to help control flood levels) are delineated from FEMA’s Flood Insurance Rate Maps (FIRMs). Floods can occur more than once within specified time frames or even within the same year. CLICK on https://hazards.fema.gov/femaportal/wps/portal for FEMA flood management maps. |