Fifteen years ago, a disastrous flood swept through the Midwest, causing an estimated $20 billion in flood damage, nearly 50 deaths and untold trauma to the hundreds of thousands whose homes were damaged or destroyed. Today we see the same kind of flooding in many of the same areas. Twenty-four deaths have been attributed to this year's floods, and economic damage is escalating into the billions of dollars. The sad truth is that while we learned a lot from the 1993 flood about how to prevent losses, we have not acted on those lessons (or those from Hurricane Katrina, for that matter). After the 1993 flood, President Bill Clinton ordered a White House study to determine what could be done to reduce future flood damage. The report recommended that those living behind levees be required to obtain flood insurance. Many of these residents, like those in New Orleans before Katrina, didn't understand the risks they faced: Levee conditions hadn't been adequately monitored, and even when problems were found, the needed funds hadn't been made available. Simply put, responsibility for dealing with floods had not been adequately defined.