South Carolina Gov. Nikki Haley (unintentionally, we’re sure) started the misinformation domino effect when she said her state has not seen the current level of flooding in 1,000 years.
If you think that a 1,000-year rainfall event means that it occurs once every 1,000 years, then click on any of the links below that will help explain what the terminology really means.
Carolina flooding and exceedance probabilities, from Homeland Security Watch
1,000 year flood explained, a short video from Weather.com
1,000 year rainfall event vs. 1,000 year flood, what that actually means, from Brad Panovich, chief meteorologist from NBC Charlotte
Making sense of the South Carolina floods, by Ivan Maddox on Intermap Answers Now