The blasting:
Mississippi River flooding: After levee blast, threat shifts to Memphis - CSMonitor.com
The floodgates:
New Flood Gates Open In Louisiana, River Cresting In Vicksburg, Mississippi : The Two-Way : NPR
Here's the thing: Where it was blasted, I would be upset and talking to a lawyer. Suing the government will be pretty tough, though.
Where they opened the gates--those people have KNOWN, for THIRTY EIGHT YEARS, that their property has the potential of being flooded. They got letters from the Army Corps of Engineers reminding them of it, too. Those people have ALWAYS known that they could be flooded at any time to alleviate pressure on the river. To hell with those people whining. They have NO REASON to whine. They have the EXACT same whine as the people that built lower than sea level in Nawlins and cried because they flooded. If you live on a flood plain--whether normal or directed--you can't whine when you're flooded.