A powerful storm dropping drenching rain on flood-prone Southern California is raising concern among forecasters that it could produce a dangerous, widespread outbreak of tornadoes, damaging winds and fires along with a blizzard as it crosses the entire United States in the coming days.

A powerful storm system threatens the US with tornadoes in the Mississippi Valley, blizzards in the northern Plains, and extreme wildfire risks in Texas and Oklahoma, affecting over 100 million people.

A potent storm system is expected to pour heavy rain on western states later this week before rumbling into the central United States