Deadly Tornadoes Strike in South

At least four confirmed dead from twisters; blinding and heavy snow snarls traffic and travel.
2:44 | 12/24/14

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Transcript for Deadly Tornadoes Strike in South
Good evening. Christmas eve, just hours away and tonight, millions of Americans are now on the move. Dangerous storms and deadly tornadoes touching down. 175 million in the storm zone tonight. And let's get straight to the piures. Starting in the south, Mississippi. At least two dead. You can see the sheer force of that twister. That ambulance, flipped on its side. And there, a funnel cloud on the horizon. In Colorado tonight, they're battling blinding snow. We showed you I-70 last night here, backed up. Well tonight, a repeat performance. A man walking his dog faster than the cars. The map says it all tonight. Those storms moving in, and now, the new system hitting in the east. ABC's senior meteorologist rob Marciano starts us off with the harrowing images tonight. Reporter: Tonight, the deep south under a dangerous threat. Severe damage in amite, Louisiana. Up to 20 house hit hard by a possible twister. And at least two confirmed dead in Mississippi. Winds strong enough to flip cars on the highway, including this ambulance. At least seven tornado reports, plus hail and wind damage as the storm steam-rolled across the gulf coast today. Storm chasers are on the ground. Today was even worse, because we had a lot of fog. A lot of light rain around the storms, so, it was almost impossible to see anything, unless you were directly hit by it. Oh, man! It is storming! Reporter: Near Baton Rouge, rain rates up to four inches an hour. Definitely white in the midwest. Snow plows out in full force. In rapid city, South Dakota, visibility down to a quarter mile this morning. And in Minnesota, rain turned to snow in a hurry, snarming the evening commute. The rocky mountains, buried in snow. Over two feet of it. A Boone for ski resorts, but getting to the slopes is a problem. Interstate 70, shut down for more than 100 miles, leaving drivers in Colorado and Kansas stranded. And rob is with us right now. The severe weather, we saw as we came on the air tonight, still brewing this is the same system moving up the east? Reporter: Yes, the system as a whole is moving very slowly. So, we still have a threat tonight, especially across the deep south. The I-10 corridor, and the Florida panhandle. A slight chance, enhanced chance to see more in the way of damaging winds and always lated tornadoes through the evening. Tornado watches remain in effect until midnight tonight. The storm system as a whole moves off to the north and east. Heavy rain from Atlanta tomorrow morning and pushing up the I-95 corridor through philly, Boston and New York. It's going to be a dangerous and at times slow come mute for I-95. And a little bit of snow along the back side of this. Snow and rain across the pacific northwest. Winter storm watches just issued for Chicago. Dangerous travel there. But it could be a white Chris has. All right, rob, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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