It will take days for major floodwaters to work their way south through the Mississippi. Flooding will persist through April.

But, how big is it, exactly? This animated map shows the scale of the Mississippi River and its drainage system in perspective. Follow Tech Insider: On Facebook More from Tech The Mississippi ...

The Mississippi River is considered the most endangered in the U.S. due to uncertainty over the Federal Emergency Management ...

After prolonged heavy rainfall upriver, Mississippi River nears flood stage in New Orleans. Corps begins levee checks and ...