On the climb south up Uvas Road past Oak Glen Avenue look to your right and you’ll see an ancient bridge over Cañada Garcia Creek. On a 1917 topographic map the road followed the creek. Sometime after that — I’m guessing the 1930s — the road was realigned to follow its present course straight up the hill.
I’ve noticed early roads followed creeks, for a lot of reasons. It was easier on the horses and they had water to drink.
Once cars came on the scene, roads straightened out and hills were no longer as much of an issue. In return, creek-flooding worries evaporated.
After a couple of frigid weekends (for the South Bay that’s low temps in the 30s), the day warmed up nicely, although it was still cold early on.