The starting point for obtaining the software is.

You must already have the Google Earth application installed on your computer to use these files. This web site provides zipped Keyhole Markup Language (.kmz) files through which users can view map overlays created from FEMA's National Flood Hazard Layer on Google Earth images.

Google Earth is a popular Internet application through which users can view maps. Google Earth version 7.3 or higher must be used for this service. Below are direct links to download the newest kmz version. Effective, the new version (V3.2) incorporates Coastal Barrier Resource System (CBRS) data directly from the authoritative source at the Fish and Wildlife Service (FWS), rather than as a feature in FEMA's NFHL. The previous version of the FEMA NFHL V3.1 file will no longer work properly. Notice: A new version (V3.2) of the Keyhole Markup Language (.kmz) file for viewing the FEMA NFHL overlays in Google Earth has been released. Using the National Flood Hazard Layer Web Map Service (WMS) in Google Earth™

Google earth pro online use