A recent spike in wildfire activity in some parts of Pinal County is causing concern for state fire management officers. Since April 1 to May 9, the Arizona Department of Forestry and Fire Management (DFFM) responded to 25 wildfires, mostly concentrated in the western portion of the county, south and southwest of Maricopa within the Thunderbird Farms and Hidden Valley areas. DFFM overhead assigned to those incidents report all 25 were found to be human-caused, many of which were due to equipment usage, such as welding and grinding.