Regions often respond differently to climate change
The relationship between summer water deficit and the amount of wildfire area burned is stronger in cooler and wetter areas like Yellowstone and weaker in warmer and drier ones like the Sonoran Desert.
Scatterplot showing Yellowstone in the upper right with high correlation between hot, dry summers and wildfires.
The vertical axis represents the correlation with wildfires. Higher numbers denote areas where hotter, drier summers increase wildfire activity. Lower numbers suggest little to no effect. The horizontal axis is water deficit in millimeters, reflecting the amount of water available relative to the vegetation's water needs. Dots are ecoregions.