100 Year Floodplain Houston Map

100 Year Floodplain Houston Map. Those areas have at least a one-in-four chance of flooding during a 30-year mortgage. A 1 percent (100-year) floodplain, also known as a Special Flood Hazard Area on a Federal Emergency Management Agency (FEMA) Flood Insurance Rate Map (FIRM or floodplain map), is an area at risk for flooding from a bayou, creek or other waterway overflowing during a 1 percent (100-year) flood


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Explore geographic data with this interactive ArcGIS web application. Those areas have at least a one-in-four chance of flooding during a 30-year mortgage.

Flood maps show how likely it is for an area to flood Explore geographic data with this interactive ArcGIS web application. Any place with a 1% chance or higher chance of experiencing a flood each year is.

. Map Viewer Classic is a deprecated product and will be removed in Q1 of 2026 Most of the flooding is in areas developed prior to the current understanding of flood potential and prior to regulations restricting construction in flood-prone areas

. Any place with a 1% chance or higher chance of experiencing a flood each year is. Those areas have at least a one-in-four chance of flooding during a 30-year mortgage.