Ebbing water, good weather brighten outlook in Midwest, but numerous obstacles remain.
Tougher border enforcement, jail time, and a slow US economy are causing some Mexicans to reconsider going north for work.
The Midwest's patchwork of levees wasn't adequately monitored or maintained.
Development, farm practices, and population growth have increased the risk of flooding.
According to federal officials, districts like Oakland, Calif., harm private bus firms by using city transit buses.
Severe weather in the US interior has wrought economic disaster. But recovery may be quick.