While the spillways will divert water away from Louisiana cities , low-lying central parts of the state will be flooded . NEW : A parish official orders evacuation , cites `` the fear of the unknown '' NEW : A Reserve levee engineer says Sunday will be `` stressful '' Morganza plans to open two of Midwest floodgates .
NEW : A parish official orders evacuation , cites `` the fear of the unknown '' NEW : A Reserve levee engineer says Sunday will be `` stressful '' Morganza plans to open two of Midwest floodgates .