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Qué es el vórtice polar, el principal detonante de la mayor tormenta de nieve en Estados Unidos en décadas
La poderosa tormenta invernal que azota a amplias zonas de Estados Unidos ya ha dejado al menos 20 muertos y cientos de miles de hogares sin electricidad.

TL;DR
- A severe winter storm has caused at least 20 deaths and left hundreds of thousands without electricity in the US.
- The storm, extending from Texas to New England, has brought unusual heavy snowfall to some areas.
- Experts attribute the extreme weather to variations in the polar vortex, which normally keeps cold air contained over the poles.
- These variations can cause cold Arctic air to descend south, leading to severe drops in temperature and storms.
- Some experts suggest climate change might be influencing the polar vortex's behavior, while others remain cautious due to insufficient data.