What this means for locks and safes here
Spring Valley sits in the hottest west-Valley basin. Polymer keypad covers and rubber gaskets on exterior deadbolts degrade in 3–5 years under west/south-facing summer UV. Sand and fine grit from spring-monsoon dust storms invade cylinder pin chambers — annual cleaning/lubrication is the difference between a 7-year lock life and a 15-year one. Smart-lock batteries die ~30% faster in summer heat above 110°F; recommend lithium AA over alkaline.