Around a million homes and businesses have been left without power in the eastern half of the United States and Texas as winter storms continue to batter much of the country. 

US utilities were working to restore power after the storms moved on from their service territories, but some were still dealing with high winds.

The greatest numbers of outages were in New England in the northeast, with 264,699 customers without power in Maine, followed by New Hampshire, Connecticut, Vermont and Massachusetts.

Nearly half of the 50 states counted more than 10,000 customers with outages due to the storms.

The extreme cold is "straining the regional power grid", resulting in power cuts, Kentucky's governor Andy Beshear has warned.

Louisville Gas & Electric and KU said they were performing "service interruptions in intervals" across the areas it serves to "minimise extended impacts".

The cuts are lasting about 30 minutes, the company said.

An outage map showed 3,908 customers without power shortly after 11pm but it wasn't clear if the cuts were part of the interruptions.

Residents have been asked to turn down their thermostats and to turn off unnecessary lights to help conserve energy.