Is my callery pear (bradford pear) dying or just stressed?

The important point is that Callery pear usually fails structurally while still looking perfectly healthy, which is what homeowners miss — a fully green crown tells you nothing. When it does show disease it is fire blight: shoot tips blacken and hook over into a shepherd's crook with dead leaves clinging, typically in late spring; stress reads as scorched leaf margins and a thin bloom, while dangerous reads as a visible crack or seam at the main union regardless of foliage.