Winter Storm

Thousands of flights have been cancelled, and power cuts have been reported in some south-eastern states.

Virginia, Georgia, and North and South Carolina declared states of emergency.

The US National Weather Service (NWS) said the storm would hit much of the eastern third of the country over the next two days, with more than 1ft (30cm) of snow expected in some areas.

The huge storm system is approaching the eastern US from the Midwest.

Snow and ice could result in "dangerous travel, power outages, and tree damage", the NWS warned.

President Joe Biden has approved a state of emergency in Texas where a surge in demand for electricity has led to widespread power cuts.

The National Weather Service (NWS) said more than 150 million Americans were now under winter storm warnings.

Kentucky, Mississippi, Alabama, Oregon and Oklahoma are among states affected.

The freezing storm even reached northern parts of Mexico where more than four million homes and businesses lost power early on Monday.