Quartz: The rainfall that caused massive flooding in Colorado last month was a once-in-a-millennium event, according to a recent study (pdf). And climate change is making those kinds of extreme weather events more common.
The impressively named Hydrometeorological Design Studies Center, a division of the National Weather Service, has concluded with greater than 90% certainty that the rainfall was millennial in nature. Here`s the chart for one rain gauge in Boulder, Colorado, that was inundated over seven...