Africanized Honey Bee Facts & Preventing a Stinging Incident
Africanized honey bees (AHB) (formerly known as "killer bees") are established in San Diego County. The entire County, from desert to coast, is considered colonized by AHB. This means that you might encounter locally extremely defensive honey bees anywhere in the County.
The links below provide more information:
Defensive bees information (UC San Diego)
PREVENT A STINGING INCIDENT