Forces of Nature: ThinkQuest 2000 (Team #C003603)
http://library.thinkquest.org/C003603/english/flooding/index.shtml
Heavy rain falls for days and days, building up too much water for groundwater systems to handle. Slowly, the water level begins to rise, creeping higher and higher until it floods into your home, submerging your furniture and belongings. In extremely bad cases, flash floods, with their rushing torrents of muddy water, sweep away houses, cars, trees, and people with ease. How can we, as humans, protect ourselves against this phenomenon? How can we learn, recover, and rebuild? Explore this section to find the answers to these questions.