Most houses in this service area went up between 1970 and 2003, with the median build year landing around 1983. That's the era of stamped steel roller brackets and single-track hardware that was fine for its time but wasn't built to run for forty-plus years without the brackets loosening. Nine named areas across Encinitas share this same building window, mostly 1980s and 90s stock, which means a lot of garage doors in different neighborhoods are hitting the same failure point at roughly the same time.
Encinitas sits in a mild temperate band, so we're not dealing with freeze-thaw cycles that crack tracks or ice that jams rollers the way you'd see inland or up north. Here, the cause is almost always mechanical wear: a bracket that's worked loose over three decades, a roller that's worn down to a nub, or a cable that's stretched enough to let one side of the door drop and bind against the track. Impact is the other common cause - a car bumper or a kid's bike clipping the bottom panel is enough to knock a track out of alignment on hardware this old.
The age of the housing stock matters more here than the weather does. That's backwards from a lot of climates, but it's how it works in this part of the county.