Weather Watch

Weather Can Be Magnet for Conspiracy Theories and Disinformation

As last week’s power blackout in Iberia shows, weather can attract disinformation as simplistic explanations and conspiracy theories are spread on social media.

Pedestrians walk on an unlit street during a power outage in Ourense, Spain, on Monday, April 28, 2025. Spain and Portugal lost power shortly after 12:30 p.m. local time in a massive blackout that idled public transport, airports and phone services, bringing the daily activities of millions to a halt.Photographer: Brais Lorenzo/Bloomberg
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When a massive blackout plunged Iberia into darkness last week, one theory pinned it on a “rare atmospheric phenomenon,” fueled by extreme temperature variations in Spain that triggered oscillations in high-voltage transmission lines.

The explanation — attributed to Portugal’s grid operatorBloomberg Terminal Redes Energéticas Nacionais — caught fire and spread in news reports and across social media. Meteorologists scrambled to look at computer models, maps and weather data to see if something in the atmosphere had caused power lines to “gallop” uncontrollably, a phenomenon known to occur under the right conditions.