High fire risk days have been common this year as the 2020 wildfire season shatters records across the West. ADVERTISEMENTWhat caused the 2020 fire season to become so extreme? The 2020 season was dry, but the Western U.S. has seen worse droughts in the recent decade. Even more alarming, we found that extreme dry-hot conditions that would have been expected only once every 75 years have occurred three to six times in many areas over the same period. When soil moisture is low, more solar radiation will turn into sensible heat – heat you can feel.