cook County Flood Hazard Information


Effective Map Products

Effective Flood Insurance Rate Maps for cook County may be viewed and/or downloaded at the FEMA Flood Map Service Center (MSC)



Preliminary Map Products

2021 Preliminary products and 2022 Revised Preliminary products are available below, or at higher resolution from the FEMA MSC:

17031C0013K
17031C0014K
17031C0018K
17031C0019K
17031C0142K
17031C0144K
17031C0151K
17031C0152K
17031C0153K
17031C0154K
 (revised 11/18/2022)
17031C0156K
 (revised 11/18/2022)
17031C0157K
17031C0158K
17031C0159K
17031C0161K
17031C0162K
17031C0163K
17031C0164K
17031C0166K
17031C0167K
17031C0168K
17031C0169K
17031C0176K
17031C0178K
17031C0186K
Index panel 1
 (revised 11/18/2022)
Index panel 2
Index panel 3
Index panel 4
Preliminary FIS
 (revised 11/18/2022)
Preliminary FIRM Database
 (revised 11/18/2022)


Changes Since Last FIRM

  • Flood Map Changes Viewer (FEMA)


    • Consultation Coordination Officer (CCO) Meeting

    12/16/2021

  • Meeting Recording (mp4)
  • Meeting Presentation (pdf)

    • Public Open House Meeting

    3/30/2022

  • Meeting Presentation (pdf)


    • Discovery Meeting(s)

  • Chicago River Watershed Discovery
  • Des Plaines Watershed Discovery
  • Lower Fox Watershed Discovery
  • Upper Fox Watershed Discovery
  • Draft Cook County Total Wetness Index Geodatabase

    • Additional Resources

  • Floodplain Mapping 101
  • Destined for DFIRMs - stream studies becoming flood maps
  • Building Footprints
  • Topographic Wetness Index
  • Links to National Flood Insurance Program (NFIP) Information

    • What is a DFIRM?

    The DFIRM Database is a digital version of the FEMA flood insurance rate map that is designed for use with digital mapping and analysis software.

    A sample DFIRM showing areas of greater flood risk in blue

    The DFIRM is designed to provide the user with the ability to determine the flood zone, base flood elevation and the floodway status for a particular location. It also has NFIP community information, map panel information, cross section and hydraulic structure information, and base map information like road, stream, and public land survey data.