A sweeping storm system moving across the U.S. threatens to bring tornadoes, blizzards and possibly wildfires to different regions of the country.

Over the next week, tens of millions of Americans will be at risk of severe weather as a colossal storm marches across the country, threatening hurricane-force winds, major flooding, blizzard conditions and a possible tornado outbreak.

Winter isn’t done with us just yet. A powerful storm system is expected to produce severe weather for millions of Americans from coast to coast this week, bringing heavy rain and strong winds to California,