Maple tree dropping green leaved

Question: The leaves of  maple trees started showing brown streaks along the veins and are now dropping their green leaves. I’m not sure if it’s a sickness or from dryness? We haven’t seen any pests on the tree. Wondering if there is anything we can or should do.
I’ve noticed other maples in the neighborhood in the same condition. We live in the Ten Hills neighborhood.

responder: Answered by the Home and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied September 09, 2024, 11:26 AM EDT
response: Our plant pathologist is looking into this, though more information will help us to narrow-down a likely cause. Has anything been applied to the area in recent weeks, like a lawn herbicide or pesticide (if someone were spraying for Spotted Lanternfly, for example)? Do you know if the tree is a Sugar Maple or a Norway Maple? And is it only maples that are affected in the neighborhood, or are other trees (say, oak) also defoliating early with dark leaf veins?  Miri

responder: The Question Asker Replied September 09, 2024, 1:01 PM EDT
response: Hi Miri.I believe it is a sugar maple, but will confirm.So far, it only appears to be the maple trees. The oaks and tulip poplars are not affected.Our neighbors spray for mosquitoes. I will ask if they sprayed for the spotted lantern fly. We do not use any herbicides or pesticides in our yard.Sent from my iPhone On Sep 9, 2024, at 11:37, Ask Extension wrote:﻿

responder: Answered by the Home and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied September 10, 2024, 3:45 PM EDT
response: Thank you for the additional information. Our plant pathologist doesn't get the impression from the pictured symptoms that this is a disease; instead, it appears to just be cumulative environmental stress triggering the tree(s) to shed leaves a few weeks early. Given how late in the growing season such leaf shed takes place, it's fortunately not a significant threat to long-term tree health, since it has had all summer to photosynthesize and store energy for future growth.  As it happens, both Norway Maple (which is invasive) and Sugar Maple (native, but mainly to our north) prefer cooler summers than our region experiences, so high heat and drought can definitely stress them. Both much of 2023's growing season as well as this year's have experienced long periods of drought.  Since there is nothing that will halt the leaf shed at this point, you can just rake-up the fallen leaves if they interfere with lawn growth or overseeding; they can be composted or disposed of in yard waste collection if you prefer. If you mow using a mulching mower (one that chops-up the clippings fine enough that they don't clump on the lawn behind the mower), then that may chop-up the fallen leaves sufficiently well that they can be left in place and just mown where they fall, as this will add organic matter (and gradually, nutrients) back into the lawn for the benefit of grass roots (and the tree's own roots).  Miri