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Air Quality During Wildfires: How to Stay Safe

Air Quality During Wildfires: How to Stay Safe

At Davis, we're proud to call the Bay Area home. Unfortunately, in recent years, our beautiful home has become a hotbed for wildfires. Last year, 7,667 fires burned more than 363,000 acres across the Golden State. And who can forget the Orange Skies Day in 2020?

So far this year, the California wildfire season has seen only about 3,000 acres burn, but our thoughts are with those to our north and east who have been affected by the 2023 Canadian wildfires. Below, we'll provide some context on what the Canadian wildfires mean in terms of air quality here in the U.S. and what you can do to keep yourself and your family safe.

What's the status of the 2023 Canadian wildfires?

As of publication (July 16, 2023), there are over 600 active major wildfires underway across Canada, according to the Canadian Wildland Fire Information System. The agency identifies major high-priority fires occurring in the Yukon Territory, British Columbia, Alberta, the Northwest Territories, and Manitoba. More than 1,000 new fires have begun since July 1 alone, putting the year-to-date total at over 3,960 fires.

So far this year, just under a million acres of wildland have burned across Canada, and unfortunately, that number will only continue to grow, creating a major land management crisis across North America. Canada isn't the only country feeling the effects of these disastrous fires, however. Smoke from the Canadian wildlands is causing a different crisis to the south in the United States.

Which areas in the U.S. are seeing air quality impacts from the Canadian wildfires?

Since early June, air quality in the upper Midwest, Eastern Seaboard, and metropolitan Northeast have fluctuated significantly due to Canadian wildfires. One of the most pronounced days for poor air quality in the U.S. was June 7, when the sky of New York City turned orange in a moment reminiscent of San Francisco just a few years ago.

Using our Davis WeatherLink network of more than 5,600 outdoor AirLink air quality sensors, we were able to capture this snapshot of one of the worst recorded air quality days in American history. Each circle on the map represents an outdoor AirLink station. Here's how to interpret the colors:

  • Green: AQI between zero and 50. This is considered good air quality.
  • Yellow: AQI between 51 and 100. Acceptable for most people except those who have severe health conditions and trouble breathing.
  • Orange and Red: AQI between 101 and 150. A larger portion of the population will begin to experience breathing difficulties.
  • Purple: AQI between 201 and 300. At this level, almost everyone, even those who are normally healthy, can experience difficulties breathing.
  • Maroon: AQI reaches 301 or higher. This level is considered very hazardous and is an air quality emergency.
Air quality map for the eastern U.S., June 7, 2023

This map illustrates the damaging effects of Canadian wildfires on air quality across the eastern U.S. on June 7, 2023. The darkest spots of these maps are indicative of the places most affected by the air quality crisis throughout this summer.


Air quality map for Philadelphia area on June 7, 2023

Here's the New York-Philadelphia metropolitan area on the morning of June 7, 2023. Notice the generally poor air quality across a region where more than 10 million people live in major cities alone.


Air quality map for New York City on June 7, 2023

This map illustrates air quality around New York City on the afternoon of June 7, 2023. These readings represent an air quality emergency for the region, which developed as the day went on.


Air quality map for the Carolinas, June 7, 2023

This map shows the Carolinas, Knoxville, and the northeast of Georgia on the afternoon of June 7, 2023. Notice how this geographic area - more than 2,000 miles from the Canadian border - is still significantly impacted by wildfire smoke.


This image was captured on the morning of July 18, more than a month after the events of June 7. As the map illustrates, plumes of wildfire smoke have continued to create dangerous conditions throughout the east, even extending into parts of New England that were unaffected by the June air quality events.

How can I tell if I'm safe from wildfire smoke?

As our map of the Carolinas illustrates, even if you are far enough away from a wildfire that you cannot see smoke or the fire itself, the air in your local area can still be unsafe. Understanding and measuring wildfire air quality goes beyond visible smoke. Smoke contains particulates that are too small to see, but this can be especially dangerous because they're small enough to enter your lungs.

In addition, the smoke from wildfires contains toxic substances that can have both immediate and long-term health effects, especially in those who are sensitive to smoke and have lung conditions that can cause breathing difficulties.

How Does Wildfire Smoke Affect the Air?

The smoke from fires can affect local air quality conditions for hundreds or even thousands of miles away. The most important thing to understand about wildfire smoke and air quality is that you do not have to see visible smoke for the air quality to be dangerous. Local media and weather stations can give you general information about trends affecting air quality from fires, but to keep you and your family safe, it is important to have information that is relevant to the immediate area surrounding your home.

This will allow you to plan and take action as needed. That is why knowing the AQI at your location with an AirLink air quality monitor should be an important part of your safety plan. If you live in wildfire territory, this is as essential as having a smoke detector and carbon monoxide detector in your home.

Can Wildfire Smoke Make You Sick?

It is important to monitor the air quality during wildfires because it can be harmful or dangerous even before you can see or smell the smoke. Smoke from western wildfires can drift as far as the East Coast, depending on weather conditions and the size of fires.

The smoke from a wildfire can travel, sink, rise, and linger miles distant from the actual flames. It can cause your nose to run, your eyes to burn, and exacerbate respiratory issues like asthma and bronchitis. Every breath you take of that air pulls microscopic particles deep into your lungs. We don't yet know enough about the health impacts of wildfire smoke, but it appears that widespread cardiopulmonary outcomes due to smoke are the most significant cause of death and illness from wildfires.

What can you do to protect yourself and your family against wildfire-caused air pollution? The CDC has a checklist of steps you can take to minimize harm from inhaling wildfire smoke.

How Do I Monitor the Air Quality During a Wildfire?

Many factors can affect wildfire air quality, such as local weather conditions, humidity, and the amount of fire control. Davis air quality monitors provide you with up-to-the-minute information on particulates from smoke in your area.

You can also view the data on your smartphone or PC using the WeatherLink app. It provides a handy graph that allows you to see whether particulate levels have gone up or down so that you can make plans. The data shows a scale that helps you determine whether the levels are mild, moderate, or pose a significant threat.


Know the Quality of the Air You Breathe


Top among their recommendations is to check local air quality reports. We’ll add on to that recommendation by suggesting that you check the air quality index (AQI) outside your home, rather than that measured some distance away. Microclimates, and therefore air quality, can vary substantially even over relatively short distances. With AirLink, you can know the AQI right where you live.

AirLink’s NowCast feature, which adjusts for quickly changing air quality, and wood smoke adjustment will give you a very accurate indication of what you are actually breathing, right now, right here.


When the AQI is high, you will want to stay indoors, especially if you have young or elderly family members or are in any susceptible group. The CDC also recommends that you keep the indoor air as clean as possible and avoid activities that increase indoor pollution. But how can you know? You can change the filter in your air intake, keep the windows closed, leave the gas range off, and the fireplace unlit. But the way to really know the effectiveness of these steps is to install a second AirLink inside your home. Now you can see clearly the difference between the air quality outside and inside. (We've made this option a little easier with our AirLink 2 pack.)

With AirLink, you will be able to access your own real-time, hyper-local AQI on your phone anytime. You will have the actual data at your fingertips to make decisions about when to shelter inside, when to turn on the air purifier, and whether that air purifier is effective.

Help Keep Your Community Safe

When you share your AQI on the WeatherLink Air Quality Map, you provide a valuable service to your neighbors, community leaders, and public health officials. Being able to see pockets of poor air quality, for example, can help your neighbor decide if, where, and when to go for a run. Seeing data from many monitors can help public health officials prepare for an increase in asthma attacks.

Davis Instruments, and AEM brand

In the face of escalating environmental risks, AEM is the essential source for insights on weather, climate, lightning, floods, wildfires, water management, and more.

Learn more about AEM and all of our solutions here.

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