Typically late summer and fall are not know for being the "fire season" across Arizona. Arizona fire season is more commonly associated with late spring and early summer as we wait for the monsoon rain to arrive. This monsoon been unusually dry with many locations across Arizona reporting record low rainfall. What inherently follows is a "secondary fire season". As the fall storm track starts to migrate south, that often translates to dry and windy days across the Southwest. Red Flag Warnings are issued from the National Weather Service when the combination of dry fuel conditions combine with the weather to promote the potential for extreme wildfire behavior.
A Red Flag Warning has been issued for Thursday, September 19th for portionsCoconino and Mohave counties.