You have fire ants in
Temecula? Back in NC (very rural) we would have 1-2' tall mounts every 20-30 feet in the fields and grass. It was constant battle to be allowed to walk in the front yard. I never had less than a dozen colonies on 6 acres. Those dudes will swarm in a second and all run up your legs and all bite at once leaving you with blisters all over. Even the dogs knew to jump and move when stepping on soft ground. Here on 90+ acres I'm never found more than 4 Yellow Jacket nests in a year. I'm sure I missed many but if they leave me alone I don't care.