Ennis's commercial buildings mostly went up around 1987, which puts a lot of them right in the window of steel sectional doors on standard torsion spring setups - hardware that was built to a cycle count, and by now most of it has quietly outlived that count. A spring that's done 15,000-plus cycles doesn't announce itself; it just breaks on a Tuesday when someone's trying to get a delivery truck loaded.
The climate band here runs moderate on heat, which is easier on springs than a harsher swing would be, but it doesn't stop the fatigue - it just slows it. Combine that with a building stock that's mostly single-owner, mostly not renovated on any regular schedule, and you get doors that get run hard for years with nobody touching the hardware until something snaps. That's the pattern we see: not sudden failure from one bad day, but slow wear on 1980s-vintage steel that finally gives out.