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If the pine has yellowing older needles (those not on the branch tips but closer to the trunk end of the branch), that is usually normal, and is only the typical autumn leaf shed that these and some other evergreens (arborvitae, spruce, etc.) experience each year. Drought could certainly exacerbate shedding volume for any species, though.

Miri

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We see the images now, thank you.

The Japanese Maples (both the upright one and the weeping "laceleaf" one) seem to have some degree of scorch, which is leaf damage due to drought stress. Were they being watered this past summer? Most of the state has been in drought status all summer and autumn long, and it has not yet abated. Even long-established plants have been getting stressed, damaged, or died outright due to the insufficient rain. While some plants will lose leaves early (or they will dry and become brittle, as these have, before they would have fallen off normally), not all will survive unscathed. You'll have to see how they fare and leaf out next spring, trimming off any branch tips or entire branches that remain bare well after the other leaves emerged normally. Some types of infectious fungi take advantage of such stress and can kill branches harmed by drought, and there is no cure or treatment for that condition; the dead wood just needs to be pruned off as it's discovered.

Do water the maples (as needed) until the ground freezes, though, so the roots get the moisture they need to keep next year's buds alive all winter. As with summer watering, feel the soil about six inches deep in the plant's root zone and water thoroughly if it has become somewhat dry to the touch at that depth. Our Watering Trees and Shrubs page provides more guidance.

The upright Japanese maple also has a small amount of powdery mildew, a very common fungal disease which looks worse than it is. It won't cause damage to the tree at this point and can be ignored. Powdery mildew thrives during conditions of warm days, cooler nights, and moderate to high humidity.

We don't see any Red Maple images, but are guessing that is the red-leaved variety of Japanese maple you were asking about. Red maple is a native shade tree much taller than Japanese maple, and which is not red-leaved during summer; its botanical name is Acer rubrum. Japanese Maples are Acer palmatum (or in the case of the laceleaf types, Acer palmatum dissectum), regardless of their leaf color, though the most popular varieties grown are red-leaved.

The evergreen pictured is not a pine, but an arborvitae. Arborvitae can also shed their oldest needles in autumn, just like pines do, but usually they are more hidden by their dense growth and it's only the needles on the interior of the shrub that turn brown and fall off. When needles on the tips of branches turn brown, that is due to either stress (over- or under-watering, like drought) or a minor insect pest like a type of leafminer. The insect rarely is abundant enough to warrant treatment, and it would be more likely given this year's weather that drought is the main factor behind those symptoms. Arborvitae are not very drought-tolerant evergreens, and many have suffered with this year's conditions. There appears to be both some natural needle shedding happening plus some stress-induced needle browning in the photos. Here too, the plant would benefit from periodic watering (after the soil is checked for moisture level) until we get cold enough for regular freezes. Leaves cannot heal from damage, regardless of the cause, but new growth (if the buds and roots that support them remain healthy) can help to cover-up older foliage until it's time for it to fall off in a future autumn.

Miri

You're welcome.

Don't trim leafless branches now; they might have just shed leaves early (or on time, really), not having died back, as it's not easy to tell the difference this time of year. Instead, wait until spring, once the leaves have emerged fully on healthy growth, to see if any bare branches remain. At that point, bare branches are presumed too weakened to keep or dead and can be trimmed off.

Miri