Flooding along the Mississippi and tributaries has worsened, exceeding record levels since a three day tornado outbreak over a week ago, with ten dead, more than a thousand homes ordered evacuated in Memphis, Tennessee, more than 2,000 in Mississippi state, and about 13% of US refinery output disrupted. [https:--www.bloomberg.com-news-2011-05-07-mississippi-river-swells-close-to-record-in-tennessee-prompts-evacuations.html "(Bloomberg)"], [http:--www.torontosun.com-2011-05-07-flooding-begins-to-wrap-arms-around-memphis "(Toronto Sun)"]