Strong tornadoes are possible near Chicago, while blizzard conditions have been blasting Nebraska and Kansas. Farther south, Oklahoma and Texas are facing critical wildfire danger.

A powerful storm system is producing whiteout conditions in portions of the central United States and nearly 7 million people are under a tornado watch as residents in parts of the Plains remain under a threat for dangerous wildfires.

Another significant winter storm is sweeping across the Midwest and central US with disruption likely. Millions of people along the storm's path from the West Coast to the Upper Midwest will experience significant weather impacts until Thursday. Forecasters are warning of heavy snow and blizzards associated with this next storm system.