Dave Malkof News Today

That came down the blanco river. very quickly and in a very powerful way. >> texas governor greg abbott will hold a briefing to update the situation coming up at 5:00 p.m. eastern and dave malkof has the latest from dallas for us. >> reporter: good afternoon, 30 million americans under the threat of either thunderstorms, more flooding even tornadoes today. its a big state. weve got it all covered starting here in downtown dallas. thats the trin tri river over my shoulder. normally its just a tri...