Much of Memphis was protected Tuesday when the Mississippi River crested at nearly 48 feet. Now, communities downriver are hoping they fare as well. Over the past week in the Delta, floodwaters along the rain-swollen river and its backed-up tributaries have already washed away crops, forced people to higher ground and closed most of the dockside casinos that are vital to Mississippi's economy. In Vicksburg, the river was projected to peak on Saturday just above the record set during the cataclysmic Great Flood of 1927. Where's the water coming from? On top of a big snow melt, many states had their wettest April since 1895, with parts of the Ohio River Valley getting over 20 inches of rain, white areas on the map. Pink areas got at least 10.