Winter Storm Cora is sweeping through the Southeast and Ohio Valley, delivering a mess of snow and some ice from Tennessee to the Carolinas and Virginia, including Charlotte and Raleigh. The wintry mess is snarling travel and in some cases icing could be heavy enough to cause power outages and tree damage.

Devastating fires in Lahaina, Hawaii and Paradise, California share a crucial root cause with the LA blazes. It's a clue to our fire future. The storm will produce heavy snow and disruptive ice for tens of millions of people across the South.

Twenty states, from Texas to Delaware, were on alert Friday for snow and ice as the storm continued to move across the South.