Springs fail from cycle count and from the mild coastal climate doing its slow work on the metal, not from any one dramatic event. This service area sits in a mild temperate band, so we don't see the freeze-thaw cracking that snaps springs suddenly in colder states. Instead the failure here is fatigue: the spring stretches and compresses thousands of times over the years until the coil metal just gives out, usually while the door is closing. A house built around 1974, like the typical Cerritos garage, has had roughly fifty years of that cycling on its original hardware if nobody's replaced it. That's long past the rated life of most torsion springs, which are built for a fixed number of cycles, not a fixed number of years. Income levels in this area sit well above the service-area median too, at $133,953 against a regional $101,138, and what that tends to mean on the ground is more owners catching a slow, weak-lift door before it snaps, and fewer runs where a spring failure has left the door slammed shut and unusable for weeks.