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El gráfico muestra temperaturas en EUA al 17 de febrero, y una explicación científica del vórtice polar..
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Un vórtice polar rodea a EUA

By Jordi Bou

February 17, 2021 - Una descomunal tormenta invernal que avanza por el sur de Estados Unidos ha cobrado la vida de al menos 30 personas y dejado a millones sin energía eléctrica Se pronostica que el clima extremo continuará hasta el fin de semana.

Blame the polar vortex, a weather pattern that usually keeps to the Arctic, but is increasingly visiting lower latitudes and staying beyond its welcome. Scientists say global warming caused by humans is partly responsible for making the polar vortex's southward escapes longer and more frequent.

More than 100 million people live in areas covered Wednesday by some type of winter weather warning, watch or advisory, as yet another winter storm hits Texas and other parts of the southern Plains, the National Weather Service said.

Around four million customers remained without power in Texas, 1.4m in Houston alone.’
The weather has threatened the nation's Covid-19 vaccination effort. President Joe Biden’s administration said delays in vaccine shipments and deliveries were likely.

Sources
PUBLISHED: 17/02/2021; STORY: Graphic News
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