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Climate change and El Niño pushed explosive hurricane ‘Polo’ to the highest category

15 October 2026 at 10:31

In barely a day, hurricane Polo, which formed in late September in the Pacific off the coast of Mexico, reached the highest category — level 5, corresponding to winds above 252 kilometers (156 mph) per hour. It was the second most powerful tropical cyclone recorded in the Pacific to date. Polo later weakened before making landfall as a storm — at category 2 — in Baja California Sur, Mexico. It left behind torrential rains, floods and infrastructure damage in northwest Mexico and the southwestern United States, and five deaths linked to those floods in Mexico.

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© Daniel Sánchez (EFE)

Flooding in Guaymas, Sonora (Mexico), caused by tropical storm 'Polo' in late September.
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