Wildfire Smoke & Air Quality

A plain-language overview of the wildfire smoke affecting Southeast Michigan — what's happening, why it matters, how to read the air quality numbers, and how to keep yourself and your neighbors safe.

What's Happening

If the sky has looked hazy, the sun has turned orange, and you can actually taste and smell something in the air — this isn't ordinary fog or summer haze. Smoke from large wildfires burning in Canada has drifted south and settled across our region. What we're breathing right now is a genuine, large-scale air quality event, not just a change in the weather.

Wildfire smoke is made up of tiny airborne particles and gases. Even far from the fires, that smoke can reduce visibility, irritate the eyes and throat, make breathing harder, and leave many people feeling tired, headachy, or simply “off.” When conditions get bad enough, spending time outdoors — or working, exercising, or traveling in it — can genuinely be unsafe.

An event like this touches nearly everything: how well we breathe, how far we can see on the road, whether it's wise to be active outside, how we get to work, and how our most vulnerable neighbors are holding up. It reaches across the whole region at once, so it's worth understanding what's happening and what we can do about it.

Who Is Most At Risk

Smoke doesn't affect everyone the same way. What's a mild annoyance for one person can be a serious health problem for someone else. Pay especially close attention to:

  • People with asthma, COPD, or other lung conditions
  • People with heart disease
  • People who are pregnant
  • Young children, whose lungs are still developing
  • Older adults
  • Anyone doing heavy outdoor work or exercise

Making Sense of the Air Quality Numbers

You'll hear a lot of terms during a smoke event. Here's what they actually mean, in plain language.

AQI — Air Quality Index

A simple 0–500 scale that turns complicated pollution measurements into a single, easy-to-read number with a color. The higher the number, the more polluted the air and the greater the health concern — think of it as a “how safe is the air right now?” score.

PM2.5 — Fine Particles

“PM” means particulate matter — tiny particles floating in the air. PM2.5 are 2.5 microns wide or smaller, roughly 30 times thinner than a human hair. They slip deep into the lungs and even the bloodstream. Wildfire smoke is loaded with PM2.5.

PM10 — Coarse Particles

Larger particles up to 10 microns wide — dust, pollen, and mold. Your nose and throat catch more of these before they reach deep into the lungs. PM10 still matters, but it's usually a bigger factor with dust and pollen than with smoke.

AQI vs. Raw Particle Levels

Raw particle concentration is the actual measured amount of particles in the air (in micrograms per cubic meter). The AQI translates that raw measurement into the friendly 0–500 health scale. The raw number is the science; the AQI is the plain-English interpretation of it.

AQI Categories at a Glance

AQI Range Category What It Means What To Do
0–50 Good Air quality is clean and poses little or no risk. Enjoy normal outdoor activities.
51–100 Moderate Acceptable, but unusually sensitive people may notice mild effects. Most people are fine; the very sensitive can take it easier outdoors.
101–150 Unhealthy for Sensitive Groups People with lung/heart conditions, children, and older adults may feel effects. Sensitive groups should limit prolonged or heavy outdoor exertion.
151–200 Unhealthy Everyone may begin to feel effects; sensitive groups more seriously. Cut back on outdoor exertion; sensitive groups should stay indoors.
201–300 Very Unhealthy Health warnings; the risk is significant for the whole population. Avoid outdoor activity; stay inside with clean, filtered air.
301+ Hazardous Emergency conditions; everyone is likely to be affected. Stay indoors, keep exertion minimal, and use a real respirator if you must go out.

Getting Through a Smoke Event Safely

At Home & Indoors
  • Stay indoors as much as possible while levels are high.
  • Keep windows and doors closed to keep smoke out.
  • Run central air conditioning on recirculate so you're not pulling in outside air.
  • If your HVAC system supports it, use a higher-efficiency filter — the EPA recommends MERV-13 (or the highest rating your system can handle). On the older residential rating scale, that's roughly a Filtrete 1900 (MPR) or FPR 10 filter.
  • Use a portable air cleaner with a HEPA filter if you have one, especially in the room where you spend the most time.
If You Must Go Out
  • Limit time outdoors and avoid heavy exertion like running, yard work, or hard labor.
  • If you must be outside for a while, wear a properly fitted NIOSH-approved N95 or P100 respirator that seals against your face.
  • Keep car windows up and set ventilation to recirculate while driving.
  • Take breathing symptoms seriously — don't push through shortness of breath, chest tightness, or dizziness.

Check Current Conditions

When smoke is in the area, one of the best tools to bookmark is the AirNow Fire and Smoke Map. It brings together official monitors, low-cost community sensors, fire locations, and smoke plume information all on one map.

It's useful because it shows conditions right where you are — not just a regional average — along with where the smoke is coming from and how it may move. Check it before deciding whether to head outside, run errands, or keep the kids in for the day.

Open the AirNow Fire and Smoke Map

Outlook, Updates & Forecasts

How long the smoke sticks around depends on two things: how the fires in Canada behave, and what our own weather does. The smoke gets pushed here by upper-level winds, and it tends to clear when the wind shifts to a cleaner direction or when a good soaking rain scrubs the particles out of the air. Watching the fire reports up north alongside our local wind and precipitation forecast gives the best picture of when improvement is likely.

Canada — Fire & Smoke Reports

Official Canadian sources on how extensive the fires are and where the smoke is heading.

Michigan — Weather & Wind Outlook

Watch for rain and wind shifts here at home — they're what actually clear the air locally.

Helpful Reference Links