Recent flash drought development across the South-Central United States, driven by prolonged hot, dry conditions through early September 2026, has expanded extreme and exceptional drought (D3–D4) areas on the U.S. Drought Monitor. As of the map valid through September 10, D4 conditions cover roughly 1.5% of the contiguous U.S., with isolated pockets now appearing in northwest Arkansas—marking the first such designation there since 2012—and lingering in western Oklahoma. The National Drought Mitigation Center, NOAA, and USDA synthesize precipitation deficits, soil moisture, streamflow, and vegetation indices to classify D4 as the 0–2nd percentile of dryness. The next USDM release on September 17 will incorporate data through mid-September, with any late-week rainfall potentially limiting further degradation before the week-of-September 15 assessment period.