Violent tornadoes are moving through Oklahoma, and there is widespread damage, with CNBC's Tyler Mathisen.» Read More
NBC's Jay Gray reporting from Mississippi on the south bracing for more flooding.
CNBC's Sharon Epperson with a look at how floods in the south have impacted commodities and particularly, oil refineries.
NBC's Jay Gray with the latest details on the the massive flooding in the south.
Michael Seery, Seeryfutures.com president with the economic impact on this spring's violent weather.