Uploaded February 2026 | Updated September 2026, 2 weeks ago

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In 2003, a "stagnant" high-pressure system parked itself over Europe, triggering the deadliest natural disaster in French history. By the time the anti-cyclone dissipated, over 70,000 people across the continent had perished. What caused this invisible catastrophe, and why did the world’s most advanced weather models fail to predict its scale?

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