In Louisiana,engineers are working to keep floodwaters away from two big cities—New Orleans and Baton Rouge.New Orleans is still recovering from the failure of its flood controls during Hurricane Katrina in 2005.
A plan to direct some of the water into the Morganza Spillway(泄洪道)means flooding rich farmlands in another part of the state.As many as twentyfive thousand people may have to leave areas that would be flooded.
The Morganza Spillway is about seventyfive kilometers up river from Baton Rouge,the state capital.The spillway is a thirtytwokilometerlong channel that can take waters from Mississippi to another river system.The spillway was used only once in 1973.
Last week,the Army Corps of Engineers exploded a threekilometerwide hole along an earth levee in Missouri.They did that to protect river towns in two other states,Kentucky and Illinois.But fiftytwo thousand hectares of farmland were flooded as a result.
The American insurance industry says natural disasters have already caused five billion dollars in damage this year.A record number of tornadoes(龙卷风)hit along a path from Texas to Georgia.The storms killed more than two hundred people in six states.At the same time,states like Texas and Oklahoma are experiencing extremely dry weather and high winds that have caused wildfires.
【语篇解读】 2011年5月中旬,美国中部暴雨不断,再加上冬季积雪融水的补给,河流小溪被灌满,然后源源不断地流入密西西比河,由此,美国中部地区遭受了80多年来最严重的一次洪涝灾害,洪水淹没了房屋、农场和道路。
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