IllinoisFloodMaps.org

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Coordinated Hazard Assessment and Mapping Program (CHAMP)

in collaboration with FEMA and in association with Illinois State Water Survey, Prairie Research Institute at University of Illinois

  • partial map of Illinois counties shaded in green, red, tan, and white
    Resources by County

    Resources available on this site for each Illinois county

  • portion of requisition form for FEMA
    FEMA Letters Of Map Revision (LOMR)

    Official revision of a current FIRM accepted by FEMA, showing changes in mapped areas

  • map of Illinois with colored areas showing areas destined for DFIRM creation
    FEMA Destined for DFIRMs (Digital Flood Insurance Rate Map)

    Displays areas of hydrologic and hydraulic (H&H) studies to eventually be incorporated into DFIRMs

  • map of high areas of wetness in the topography
    Topographic Wetness Index

    Topographic Wetness Index (TWI) is used to quantify topographic controls on hydrological processes

  • portion of Illinois map showing counties colored by whatersheds
    Watersheds

    Illinois land areas that channel rainfall and snowmelt to creeks, streams and rivers

  • map showing building footprints outlined for emphasis
    Building Footprints

    Shapefiles of building footprint polygons using Illinois LIDAR data

  • partial cover of Hazard Mitigation Plan brochure
    Mitigation & Planning

    Hazard Mitigation Plan projects and assistance

  • person in rain boots and yellow slicker walking through flooded area
    Other Resources

    Links to more information about flooding and other hazards, hazard mitigation, and partner organizations

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