Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) -- Historic flooding forced the U.S. Coast Guard to shut down commercial traffic on part of the Mississippi River Friday as authorities downstream raced to build and reinforce levees, polish evacuation plans and warn residents to start thinking about getting out. "When you see the Mississippi River and it's about two miles wide because it's lost its borders, it's sobering," said Tennessee Gov. Bill Haslam. The Coast Guard closed a five-mile stretch of the river at Caruthersville, Missouri, on Friday to prevent waves generated by passing barges from damaging levees and flood gates along the river, Chief Warrant Officer Lionel Bryant said.Tennessee governor says sight of the Mississippi two miles wide is "sobering"The Coast Guard is closing part of the Mississippi River to protect levees and flood gatesAuthorities urge some Memphis, Tennessee, residents to evacuate 
 Question:The _ is expected to crest about 14 feet above flood stage at Memphis on Wednesday.

Mississippi River