Polk County and several other counties in central Iowa remain under a flood watch through Friday night.

For nearly a month, hundreds of thousands of Iowans have not been allowed to water their lawns—even though there's no drought ...

While Iowa's problems are uniquely severe, nitrate levels are a rising concern in other regions, from California to the Chesapeake Bay.

The portion of the state with no drought has more than doubled since early June. See the newest Iowa Drought Monitor map to see where drought remains.