Tens of millions of people across the central and southern US are at risk Tuesday of severe thunderstorms and tornadoes and fire weather on the storm’s warm side and blizzard conditions on its cold side.

The storms are among the first big tests for meteorologists at the National Weather Service after hundreds of forecasters were fired under President Donald Trump.

A powerful storm system is sweeping across the United States, bringing severe weather conditions from the West Coast to the East Coast. The storm is causing blizzard conditions in the central U.S. and triggering tornadoes in the South.