Historic El Niño Brings Unprecedented Weather Impacts Across U.S.
Historic El Niño Brings Unprecedented Weather Impacts Across U.S.
US · Published Sep 11, 2026
The ongoing El Niño event is shaping up to be one of the strongest in recorded history, with significant implications for weather patterns and agriculture across the United States.
Experts from the University of Arizona, including Michael Crimmins and Ed Martin, have highlighted the event's intensity, which may rival or exceed any El Niño observed in the last 1,000 years.

Impact & Risks

The increased rainfall is a double-edged sword for farmers, especially in drought-stricken areas. While the precipitation offers temporary relief, excessive rainfall can disrupt planting and harvesting schedules, particularly in regions like Yuma County, Arizona, which produces 90% of the nation's winter leafy greens. Flash flooding and infrastructure strain are additional risks. Furthermore, warmer temperatures associated with El Niño may reduce snowpack runoff efficiency, exacerbating long-term water challenges. Experts also warn that strong El Niño events often lead to multiyear La Niña conditions, which could bring drought back to the Southwest.

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