Arctic blast sweeps through US north-east with record-breaking temperatures

Temperatures will be 10 to 30 degrees below average over parts of the north-east as millions under wind chill warnings

An Arctic blast has swept through numerous parts of the north-east, leaving millions of people under wind chill warnings and cities and states issuing emergency warnings.

Record-breaking temperatures will be 10 to 30 degrees below average over parts of the north-east and into the coastal mid-Atlantic, the National Weather Service announced on Saturday, with wind gusts potentially reaching up to 40 to 55mph (64 to 88km/h).