The fire burned so fiercely on July 26 that it created a fire tornado of flame, ash and combustible gas.
VIDEO: Cal Fire blames firenado for death of fire inspector in Redding
The tornado was about the size of three football fields at its base.
The report released Wednesday says Jeremy Stoke got caught in that fire tornado.
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The 37-year-old Redding fire inspector was driving when he made an emergency call saying he was getting burned over and needed a water drop.
Crews tried to get his location but got no response.