Riverside spreads across about 81 square miles of inland valley beside the Santa Ana River, where July highs average 93 degrees and rain is scarce. Its orange-grove past and its dry heat decide which pests reach your house.
Riverside is the seat of its county and had 314,998 residents in the 2020 census. The city takes its name from the Santa Ana River and sits at about 860 feet downtown, with Mount Rubidoux, Box Springs Mountain and March Air Reserve Base along its edges. In 1874 Eliza Tibbets received three Brazilian navel orange trees, and by 1882 almost half of California's citrus trees stood in Riverside.
That orchard past still shows in Arlington Heights and along Victoria Avenue, where citrus lines the roadway. Add a semi-arid climate with about 9 inches of rain a year and roughly 22 days at 100 degrees or more, and pests follow fruit trees at night and chase water indoors by day. Each lot gets its own plan, starting with the yard.