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Government or official record

The Great Flood of 1993

U.S. Geological Survey

Where this source supports the record

Each entry separates the article’s editorial relevance note from its exact, section-level claims. A bibliography link without a direct claim is labeled plainly.

  1. Natural disasters · April–October 1993

    The Great Flood of 1993

    Mississippi–Missouri river flood region · United States

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    Why editors use it here

    Federal hydrologic analysis of streamflow, precipitation, inundation, and records.

    1. Quick read

      Persistent rain from spring through summer 1993 saturated the upper Mississippi and Missouri basins, producing months of record or near-record flooding across nine states.

      Reviewed 26 July 2026
    2. Trigger and conditions

      From June into August, recurring thunderstorms delivered extraordinary rain over Iowa, Kansas, Missouri, Minnesota, Nebraska, and the Dakotas.

      Reviewed 26 July 2026
    3. Uncertainty

      Fatality totals vary from forty-eight to about fifty depending on geography and indirect deaths.

      Reviewed 26 July 2026
    4. Why it matters

      The 1993 flood demonstrates that a river basin is one connected system even when levees and governments divide it.

      Reviewed 26 July 2026