Recent USDA Agricultural Commodities in Drought data positioned roughly 21% of U.S. corn production in drought-affected areas as of late September 2026, driving the leading 15–24% market outcome. Remnants of Hurricane Polo delivered heavy rainfall across the western Corn Belt and Four Corners region, easing short-term deficits in parts of Iowa, Nebraska, and Missouri while leaving persistent moderate-to-severe drought (D1–D2) across southern and central Plains states. Drier, warmer conditions this week have accelerated harvest progress but have not yet altered cumulative soil-moisture deficits captured in the U.S. Drought Monitor. Traders are watching the next weekly update for any further improvement from recent precipitation before the resolution window closes.