Yale Climate Connection —
When it rains, it pours.
Today’s rainstorms give new meaning to this age-old expression.
Extreme precipitation has increased in nearly every region of the mainland United States since the start of the 20th century, according to the Fourth National Climate Assessment, a comprehensive scientific report about climate change in the U.S.
The Southwest is the only region experiencing a decrease in heavy precipitation events. But even there, the intensity of rainfall during the region’s monsoon season has increased since the 1960s, according to a study in the peer-reviewed journal Geophysical Research Letters.