Severe weather threatens millions across central US.

Federal forecasters have issued two rare "high risk" zones for severe weather, one near Memphis and the other on the border between Iowa and Illinois. More than a dozen states are expected to be impacted by violent thunderstorms, with several tornadoes a near certainty. Heavy snow and strong winds are also expected to produce blizzard conditions from the Dakotas to northern Michigan. President Biden is visiting areas severely damaged by tornadoes last week and is expected to announce that the federal government will cover the total cost of the state’s emergency measures for the next 30 days.