Subsidence is not the same across Fort Bend County

Groundwater withdrawal can lower pressure in an aquifer and compact its clay- and silt-rich sediments. The land surface then sinks. That subsidence can change how creeks and bayous drain and can worsen flood risk.

The Legislature created Fort Bend Subsidence District in 1989 to regulate groundwater withdrawal across the county. Its 2025 monitoring report found rates above two centimeters a year in parts of northern and northeastern Fort Bend, while Richmond, Rosenberg, and much of the south measured far less.

Use the district's monitoring maps for the local pattern and the effective FEMA map for the property's flood zone. Neither map alone proves whether one house will flood.