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.

Tens of millions of people living in the Midwest and central U.S. could be impacted by tornadoes on Wednesday while critical wildfire conditions continue to impact the Southwest, after recent wildfires and a tornado outbreak killed at least 42 people over the weekend.

Another storm system is affecting millions of people in the middle of the U.S. Parts of the Midwest and Great Plains faced blizzard conditions Wednesday and a broad swath of neighboring states are at risk of high winds and wildfires.