Climate change: When rain, rain won't go away - USA Today
Such storms have become the signature of climate change across the Northeast, afflicting older cities and towns built at a time of more modest rainfall.
This wasn't just another 1-in-500-years event happening, a freak occurrence, a one-off event. Rather, experts see it as the new normal across the Northeast, the latest in a series of calamitous weather events occurring because of, or amplified by, climate change.
What's causing the additional rain? It's simple. Warmer air causes more evaporation from streams, lakes and seas. Warmer air also holds more moisture. So, when it falls, it really unloads — thus, more extreme storms.
"Increased extreme precipitation in the Northeast is one of the clearest signals of climate change that we can see nationwide," says climate expert Donald Wuebbles of the University of Illinois in Urbana-Champaign. "It's not just more rain, but more rain falling in buckets over long periods of time."