Louisiana : A parish official orders evacuation , " ` ` the fear of the unknown '' Mississippi : A Mississippi levee engineer says the next few days will be ` ` stressful '' The Army Corps of Engineers plans to open one - fourth of the Mississippi spillway 's gates .
NEW : A parish official orders evacuation , cites `` the fear of the unknown '' NEW : A Mississippi levee engineer says the next few days will be `` stressful '' The Army Corps of Engineers plans to open one-fourth of the Morganza spillway 's floodgates .