U.S. rivers are experiencing unprecedented and unexpectedly intense warming

U.S. rivers are running hot. A new analysis of nearly 1,500 river locations over more than 40 years found that the frequency, intensity and duration of heat waves is increasing in streams across the country, posing a threat to many species that are adapted to cooler temperatures. “The trend of river heat waves is actually increasing faster than the air heat waves. So, that’s one thing that is