A powerful storm chain has brought blizzard conditions to the Upper Midwest, with dangerous winds elsewhere and the threat of severe storms heading east. Heavy snow piled up Sunday in portions of Minnesota and Wisconsin. Forecasters also are tracking strong winds across the Plains, raising concerns about travel and wildfires. And the National Weather Service is warning about the threat of severe thunderstorms, damaging winds and likely tornadoes starting in the mid-South late Sunday and along the East Coast on Monday, particularly from Maryland to South Carolina. Hawaii is also being affected by continued severe flooding.

Powerful winds and extreme weather are knocking out power, damaging property, and fueling wildfires across parts of the United States. About 346,000 customers were still without electricity in Ohio, Pennsylvania, and Michigan on Saturday. Officials in Nebraska say wind-driven grass fires are responsible for one death, with at least 12 structures destroyed. Blizzard conditions were expected in the Upper Midwest.