NEW : Towns rush to build makeshift barriers to hold back rising floodwaters . The flooding has forced the evacuation of more than 100,000 people from their homes in some areas and left thousands homeless across Louisiana. Record flooding anticipated for towns in Illinois , Missouri . High water forces officials to close U.S. 34 span between Iowa , Illinois . President Bush said he and a team will travel to Iowa this week . FEMA sets up 6 centers in Iowa ; 24 counties declared disasters .
NEW : Towns rush to build makeshift barriers to hold back rising floodwaters . The flooding has forced the evacuation of more than 100,000 people from their homes in some areas and left thousands homeless across Louisiana. Record flooding anticipated for towns in Illinois , Missouri . High water forces officials to close U.S. 34 span between Iowa , Illinois . FEMA sets up 6 centers in Iowa ; 24 counties declared disasters .