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100-year floods: The metric behind America’s infrastructure is out of date, and thanks to climate change we’re paying the price.

“It’s kind of a mess, even in the absence of climate change,” said Daniel Wright, an associate professor at the University of Wisconsin. Wright helped Madison adopt climate-conscious design guidelines and works with the magically named U.S. Office of Water Prediction. “Almost all of [the models] assume that data varies from year to year, but underlying drivers are not changing over time. Those assumptions just don’t hold.”