Many Diamond Bar homes are positioned on or around hillsides, creating properties with varying grades, retaining walls, elevated yards, patios, and multiple exterior elevations. The city specifically notes that many homes are located at the top or base of privately owned hillsides. These architectural and landscape conditions can make certain pest vulnerabilities less obvious. Rooflines, fascia, decks, retaining structures, fences, garages, exterior trim, and other wood components may be exposed to years of sun and weather while remaining difficult for homeowners to inspect closely. Drywood termites can establish colonies inside dry structural wood without requiring contact with soil. Their concealed nature means a property can look well maintained while termite activity develops inside roof components, trim, framing, or other wooden elements.