Hundreds of thousands of households in the US have no power as a major storm rolls across the country, which is also leading to flight cancellations and road closures.
Snow, ice and freezing rain are creating "life threatening" conditions stretching from Texas to New England that could last for several days, according to the National Weather Service (NWS).
At least two people died of hypothermia in Louisiana, with state health officials linking their deaths to the storm, and another death was reported in Texas.
As of Sunday afternoon, more than 1 million households had lost power, according to poweroutage.us. Meanwhile, more than 10,000 flights were cancelled, FlightAware reported.
Around 180 million Americans - more than half the population - are set to be affected by widespread heavy snow, sleet and freezing rain, which is a dangerous phenomenon where cooled rain droplets freeze instantly on surfaces.
