Here in the Kansas City area, people will soon enjoy one of nature’s
finest shows- fall foliage. Color-changing leaves make for a beautiful
display, but early changes in leaf-color can be a sign that your tree is
stressed and is susceptibile to insect and disease attack.
If the leaves on your trees seem to have gotten a jump-start on fall
compared with those on similar trees in the area you might want to
consult a professional arborist who can identify any problems and offer
possible solutions.
Premature colors can be an indication that a tree is not vigorous
enough to withstand insects and disease organisms that may attack
it, not to mention the usual changes that occur when the weather
turns cold.
Occasionally, one one or two limbs of the tree will show premature
fall color. This could be a sign of a disease at work, weakening only
the infected limbs. The more common situation is tor the entire tree
to exhibit premature fall coloration, a phenomenon usually linked to
root-related stress.
Sourced sited from the Tree Care Industry Association.