Maine.
Floods are most common during spring and summer
Most floods are meteorological.
It depends on how much it rains. Any part of Nebraska can have the most floods. But usually Nebraska only floods by rain.
Most flash floods occur after late afternoon rainfall.
Texas
Currently (January 2011), most of the state of Queensland is affected by floods. 75% of the state has been hit by floodwaters or is still underwater. These floods are beginning to extend south into New South Wales, and they are likely to affect the entire eastern half of the Australian continent.
china
japan
the hudson river, and every year, it floods Maine. :P
They mostly happen in south America or in Mexico where the land is dry is where the floods occur.
japan