This does look like typical symptoms of environmental stress (that is, not due to a pest or disease), and drought stress is our primary suspect given that the weather has been dry of late (recent rains notwithstanding). Were you able to water the tree? Is the tree relatively new (only in the ground a few years)? The fall coloration in preparation for leaf shed looks limited to older foliage, so that isn't as concerning as if it included lots of new leaves as well. Feel the soil about six inches deep in the root zone and water well if the soil feels somewhat dry to the touch at that depth. If recent rains have replenished soil moisture, that should be fine, but nothing can reverse leaf color changes like this and some leaf drop will still occur.

If anything else is contributing to its stress, like wood-boring beetle attack or opportunistic fungal infection, both of which can target drought- or heat-stressed plants, it will present with new symptoms that may be easier to diagnose. Nothing can be done to prevent or treat either condition other than minimizing stress on the tree via watering and avoiding wounds from storm damage (pruning off any torn or snapped branches) or cuts to the bark from any lawn mowers or weed-whackers that might be used in the vicinity.

Miri