There's been very heavy rain here, and the Mississippi was very high.
A hundred and fifty years ago, the settlers who came out here found a number of shallow prairie lakes covering up some of the soil. Thinking it wasteful not to use all of the extremely fertile soil in crop production, they constructed a system of pipes called "tile" several feet underground to drain off the excess water to rivers. Later, county governments built larger conduits to connect the patchwork of tile, and today most of the farmland in Iowa and Illinois is underlaid with it. It carries rainfall swiftly to rivers feeding the Mississippi before lakes can form.( Collapse )