Southeast Texas here spans the Gulf Coast cities of Beaumont, Orange and Port Arthur and the Piney Woods cities of Huntsville and Conroe.
Soil data is thinner on the coast: around Beaumont and especially Port Arthur, much of the ground is built over, so the soil survey has little to report and the numbers should be read as indicative. Huntsville and Conroe have fuller data and rate moderate for shrink-swell, with shallow rock mapped around Huntsville.
Across the 5 Southeast Texas cities profiled here, the soil survey rates shrink-swell high around 1, moderate around 3 and low around 0; 1 lack enough soil-survey data to rate.