While our understanding of how climate change affects extreme weather is still developing, evidence suggests that extreme weather may be affected even more than anticipated. Changes in precipitation are quite complex,9 and current computer models of climate have only a limited ability to predict the heaviest precipitation. Recent observed changes in precipitation have been even greater than the changes projected by climate models.10 Even with their limitations, current models still capture the physical processes associated with the observed increases in intense precipitation. Warmer air holds more moisture. That additional moisture fuels increases in precipitation intensity. This has been been measured in real-world observations as well as simulated by climate models.