These maps are made in cooperation with local communities using the sciences of hydrology, topology, meteorology and engineering to identify floodplain hazards. Remapping is typically initiated at the request of a community who feels that their current map is inaccurate. Occasionally FEMA will also recommend remapping based upon conditions we encounter during a site visit. When a community is to be remapped, FEMA works with the Army Corps of Engineers to provide the technical assistance necessary to generate an accurate flood map. Channel and surface conditions change.
Weather patterns change.
Some recently developed areas have never been mapped. As a result, many of these maps may now be inaccurate. Innovative digital engineering technology will provide highly accurate maps that will allow local communities to better assess the flood risks they face. Accurate maps also allow communities to better manage their floodplains, and enable financial institutions to protect their investments by requiring those who live in the floodplain to insure their property.