Recent record warmth and precipitation shortfalls across the contiguous United States during summer 2026 have driven expansion of exceptional drought (D4) conditions, particularly in the Southern Plains, Lower Mississippi River Basin, and Southeast, while improvements occurred in the West and northern Plains. The U.S. Drought Monitor for the week ending September 22, 2026, classified 1.8% of the nation in D4—the most severe category on the five-level scale based on integrated precipitation, soil moisture, streamflow, and vegetation data—with D1–D4 drought affecting nearly 50% of the country. The next weekly update, incorporating data through early the following week, will reflect any rapid changes from late-September rainfall or continued dryness. Traders monitoring state-level D4 presence should watch National Weather Service short-term forecasts and the Thursday release for threshold shifts in affected regions.