Praise to all deities, the fire ants have not made it to northern California. Yet. They were stowaways a year or so ago to the Port of Long Beach, so now southern California gardeners and homeowners will eventually know the horrors of these creatures from He**.
I can speak with authority: My family of origin was assigned to Lackland AFB (San Antonio, TX) and MacDill (Tampa, FL) and my father retired from the USAF in Tampa. So...from the summer before 5th grade through the summer after high school graduation, we were in Florida, Panama, Texas, or Florida again. Oh, yeah; fire ants. I am terribly allergic: if one of them bites a toe, my LEG swells up.
I can only hope that someone, somewhere is researching a feed-inhibitor for these demonic creatures.
Sunset Zone 17, USDA Zone 9