Temperatures in parts of the United States could drop to record lows of -30C (-22F) as a result of a “polar vortex” of cold, dense air.
John Hammond from the BBC Weather Centre explains what causes the unusual phenomenon
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Temperatures in parts of the United States could drop to record lows of -30C (-22F) as a result of a “polar vortex” of cold, dense air.
John Hammond from the BBC Weather Centre explains what causes the unusual phenomenon
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