By late July the Blackland Prairie clay under Greenville has opened its long dark cracks, and every blade of grass is a small argument with the heat. Big Dawg Irrigation keeps lawns cut and tended through that stretch, working the cooler hours when shade pools on the east side of the house. Mowing at a height the turf can live with, trimming close to fence posts and mailbox stems, clearing the drive of every stray clipping — small disciplines that carry a yard until the September rains come back through Hunt County. Evening arrives with the cicadas winding down and the smell of cut grass hanging in air that finally moves. The lawn looks like it decided to stay green on purpose.