How a dead hurricane can still cause floods 1,000 miles inland

Space · Published 23 October 2026 · Updated 23 October 2026 Swipe more like this →

In short: Hurricane Polo dissipated over Mexico on September 29, but its impact did not end there. This documentary tracks the invisible journey of tropical moisture as it travels from the Pacific coast into the heart of the United States.

The film explores how the remnants of a storm can trigger flash flooding far from the coast. It follows the path of moisture lifted from the ocean through California, Arizona, New Mexico, Texas, and the Plains.

The documentary examines the mechanics behind this phenomenon, specifically how mountains and cold fronts can extract heavy rainfall from tropical air, and why arid desert landscapes are particularly vulnerable to rapid flooding.

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