Warming Behind Floods, Drought

newsweek.com — The frequency of downpours and heat waves, as well as the power of hurricanes, has increased so dramatically that "100-year storms" are striking some areas once every 15 years, and other once rare events keep recurring. As a result, some climatologists now say global warming is to blame. Rising temperatures boost the probability of extreme weather, says Tom Karl, director of the National Climatic Data Center and lead author of a new report from the Bush administration's Climate Change Science Program; that can "lead to the type of events we are seeing in the Midwest."

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