The Rockwall County Commissioners Court Workshop Meeting on April 24, 2025, focused on critical discussions regarding flood mapping and modeling in the area. A significant portion of the meeting was dedicated to analyzing floodplain data provided by FEMA and comparing it with local modeling efforts.

During the meeting, officials reviewed FEMA's floodplain mapping, which indicates areas at risk during a hundred-year flood event. The discussion highlighted the differences between FEMA's one-dimensional modeling approach and the more detailed, two-dimensional modeling used by local experts. The local model identified areas of unmapped flooding, represented in cyan blue on the maps, which indicated depths of flooding greater than half a foot, with some areas experiencing depths of two to three feet.

The conversation also touched on the criteria used by FEMA to determine flood risk. FEMA typically maps flood zones based on water depth, often to a tenth of a foot, which can lead to discrepancies in flood risk assessment. The local model, however, provides a more nuanced view of flooding, showing areas that may not be captured in FEMA's broader assessments.

Officials expressed the need for accurate flood mapping to inform future development and safety measures in Rockwall County. The meeting underscored the importance of understanding local flood risks and the potential for more detailed modeling to enhance community preparedness.

As the county moves forward, the discussions from this meeting will likely influence future flood management strategies and policies, ensuring that residents are better informed about flood risks in their areas.