Smoke and Heat: Should You Postpone Tree Work?

Yes, some tree work should be postponed when smoke and heat occur together. Check the air quality at the work address, the heat advisory, nearby electrical hazards, and how demanding the task will be. A short ground-level inspection may still be reasonable in some locations. Pruning, hauling, climbing, chainsaw work, and long property walks may need to wait. A cooler hour is not always a cleaner-air hour, so check both conditions again before anyone goes outside.

Snohomish County conditions checked August 6, 2026

A National Weather Service air quality alert issued at 12:41 p.m. covered Snohomish County through 8:00 a.m. Friday, August 7. It described air quality across most of the alert area as Moderate to Unhealthy. Conditions were expected to improve gradually, with slower improvement in Cascade locations.
A National Weather Service heat advisory covered Everett, Marysville, Lynnwood, South Everett, Monroe, Lake Stevens, Darrington, Granite Falls, Snohomish, and nearby areas through 10:00 p.m. Friday, August 7.
These end times are forecasts, not promises that every location will be clear or cool. Check the Washington air quality map and the current National Weather Service heat advisory again before proceeding.

When should you postpone tree work?

Postpone when poor air, heat, electrical hazards, or demanding work create more risk than the task justifies. This is a practical scheduling decision, not a rule that every outdoor job must stop throughout Snohomish County.

Use this quick guide:

What you find	Safest next step
A downed wire, sparking, fire, or immediate threat to a person	Stay away. Call 911 for an immediate life-safety emergency. Report a fallen line or outage to the utility.
A branch or tree touching or hanging near electrical lines	Do not inspect it closely or begin tree work. Contact the utility first.
Air quality is Unhealthy, or the person doing the work is having symptoms	Stop or postpone outdoor work and move to cleaner indoor air. Follow public-health or medical guidance.
Air quality is Unhealthy for Sensitive Groups and the task is strenuous	Reduce outdoor time and intensity. Postponement is often the more practical choice, especially for a sensitive person.
The job involves climbing, cutting, dragging limbs, loading debris, or prolonged sun exposure	Treat it as strenuous work. Recheck both heat and smoke before deciding whether it should proceed.
The task is a brief ground-level photo check with no wires or unstable trees nearby	It may be reasonable if conditions at the address are acceptable. Keep it short and leave if conditions worsen.

Why is a cooler hour not always a cleaner-air hour?

Temperature and smoke do not always improve on the same schedule. Early morning may feel cooler, but smoke can remain or collect in some valleys and foothill areas. Wind changes can also improve one location while worsening another.

The August 6 air quality alert said improvement in Cascade areas was expected to lag behind other parts of the alert area. That means a property in or near the foothills may have different conditions from a property closer to Puget Sound.

Do not choose a start time from temperature alone. Check the nearest air monitor and its recent trend. Then check the hourly weather forecast. Repeat that check shortly before the visit because smoke can shift.

How should you judge the intensity of the planned work?

The harder and longer the task, the stronger the reason to postpone during combined heat and smoke. Washington State Department of Health guidance says to limit both the time spent outside and the intensity of physical activity during smoke events. The National Weather Service also advises moving strenuous outdoor activity to cooler hours when possible.

Tree-related tasks can be grouped into three simple levels:

Lower intensity

Taking photos from a safe, open area.
Checking whether a driveway or walkway is blocked.
Looking at a tree from ground level without standing beneath damaged limbs.
Making notes for a contractor, HOA board, owner, or tenant file.

Moderate intensity

A long property walk.
Raking or gathering light debris.
Repeatedly carrying small branches.
Walking slopes, large parking areas, or several rental properties.

High intensity or specialized work

Pruning or removing trees.
Climbing, chainsaw use, or handling large limbs.
Dragging, chipping, or loading heavy debris.
Roof, ladder, or storm-damaged tree work.
Any work near utility lines or electrical equipment.

Homeowners and property managers should not attempt the specialized tasks themselves. Smoke and heat add to hazards that are already present during tree work.

What should an HOA or property manager check before a visit?

Use one repeatable check for each property rather than making a countywide decision. Conditions and hazards may differ across a group of rental homes or HOA-managed sites.

Check the work address. Review the nearest monitor on the Washington air quality map, including the recent trend.
Check the hourly forecast. Look at temperature, heat alerts, wind, and any updated smoke information.
Define the task. A five-minute photo visit is not the same as a two-hour cleanup or pruning job.
Check for electrical hazards. Keep people away from trees or limbs near lines and contact the utility first.
Consider who will be outside. Do not assume the same conditions are suitable for every resident, employee, vendor, or volunteer.
Set a stop point. Delay the visit if air or heat conditions worsen, visibility drops, or the site has unstable branches, wires, fire, or another immediate hazard.
Document the decision. Record the time, source checked, task, site condition, and reason for proceeding or postponing.

For more help organizing seasonal concerns, see the Snohomish County fire-season tree guide. If you find broken branches, a new lean, or other visible damage, use the hazardous tree warning-sign guide without trying to diagnose the tree from a photograph.

What if a tree is near a power line?

Make the utility the first call. Do not approach a fallen line or try to move a branch away from electrical equipment. Snohomish County PUD says to stay at least 30 feet from fallen power lines and report them to the PUD. Call 911 if the situation presents an immediate threat to life.

Do not use a ladder or measuring tool to identify the line or estimate clearance. Keep residents, workers, pets, and vehicles away while you contact the utility. The Snohomish County PUD Outage Center provides current reporting information.

Can a tree visit proceed after the alerts expire?

Not based on the expiration time alone. An alert can expire while smoke remains at a particular address. It can also be extended or replaced. Heat may ease before smoke does, or air may improve while the site remains too hot for demanding work.

Check actual conditions again on the day and shortly before the appointment. If the work involves a removal permit, protected area, street tree, or right-of-way, confirm the rules with the correct city or county office before work begins.