1. How do I tell if my house is in the floodplain? Visit one of the interactive map websites hosted by the City of Houston, Harris County Flood Control or FEMA at the web addresses below and enter your address or zoom into your area. www.gims.houstontx.gov www.harriscountyfemt.org www.msc.fema.gov If you need help using City’s interactive map or don’t have internet access, you can contact the...