SAN FRANCISCO — This week, 49 states are experiencing “moderate drought or worse,” according to the U.S. government. That ...

Clausius-Clapeyron shows that for every 3 degree Fahrenheit increase in temperature, there is a 10% increase in the amount of ...

It's a core equation in physics called the Clausius-Clapeyron relation. It says for every degree Celsius the air warms, it can hold 7% more moisture (4% more for every degree Fahrenheit).

Even for an era of more extreme weather, this autumn has seemingly shifted into yet another gear, especially in a rain-weary ...