Not to startle you, but according to Sod University, “When St. Augustine grass is turning brown or yellow from drought stress, it’s about to die.” This means quick action is required on your part because you don’t have much time to save it. Sod University recommends a tug test: “If the grass easily comes out of the ground, it’s dead. If there’s a little bit of resistance, there may still be hope.” Find their tips here: