Whitby, ON Live Wildfire Smoke Map
Get Alerts For Wildfires In Your Area
The moment a wildfire starts near you, you'll get an instant alert and simple tips to reduce your smoke exposure.
What's In The Smoke
30xSmaller than a human hair
Fine enough to reach deep into the lungs. A MERV 13 is built to capture it.
How Far It Travels
It Doesn't Stay Local
Smoke rides the wind far downwind — you can get smoky air with no fire nearby.
What To Do During A Smoke Event
Simple steps to reduce indoor exposure.
- Stay In, Close UpShut windows and doors to keep smoke out.
- Set Fan To "On"Keeps air cycling through your filter, not just when heating or cooling.
- Recirculate AirSwitch off fresh-air intake so you're not pulling smoke in.
- Run A MERV 13Built to capture the fine PM2.5 in smoke.
- Add A PurifierExtra filtration for the room you use most.
- Wear an N95 if OutsideFits snug to block fine particles — a cloth mask won't.
The Best Air Filter For Wildfire Smoke
During smoke events, the EPA recommends upgrading to a MERV 13 filter — or the highest-rated filter your system can handle — to help reduce the fine particles smoke brings indoors. MERV 13 is the level most home HVAC systems can run while still capturing PM2.5, the fine particulate that makes up the bulk of wildfire smoke.
- Captures PM2.5 particles
- Blocks ash, soot, and smoke odor
- Keeps your indoor air safe—even when the outdoor air is dangerous
- Meets the EPA's recommended rating for filtering fine wildfire smoke particles.
Wildfire Smoke FAQs
Facts About Wildfires
Over 70,000 wildfires burn in the U.S. every year.
Wildfire smoke can travel 1,000+ miles, affecting states that aren't even near the blaze.
Exposure to wildfire smoke can worsen asthma, trigger heart issues, and lead to ER visits.
Indoor air can hold more fine particles during wildfire events unless it's properly filtered.
The EPA advises using MERV 13 filters or portable HEPA air cleaners during wildfire smoke events.
Don't Wait Until The Smoke's Inside.
Use the live wildfire smoke tracker and upgrade your air filters today to protect your lungs and your home.
Shop Filters For Smoke Protection
Live Whitby, ON Forest Wildfire & Smoke Map Today
Local Air Quality Tracking & Indoor Protection Solutions
TL;DR
Whitby sits south of Ontario's forest fire region, so its smoke drifts in from wildfires hundreds of kilometres away. Use the live wildfire map above for active fires and smoke, the FireWork forecast from Environment and Climate Change Canada (ECCC) for where the plume is heading, and the Oshawa AQHI, which covers Whitby, for the air right now. On smoky days, close up the house, run a MERV 13 furnace filter with the fan on and use a portable HEPA air cleaner in the rooms you use most.
Key Takeaways
Whitby has no provincial air monitor; its AQHI comes from the Oshawa station, 9.9 km north-north-east of Whitby GO Station and 3.8 km from Brooklin.
Whitby sits outside Ontario's forest fire region, so report any fire in town by calling 911.
In July 2026, wildfire smoke pushed the Oshawa AQHI to 10+ and Whitby cancelled its playground programs.
During smoke events, the U.S. EPA recommends a MERV 13 filter in central HVAC systems, with the fan running continuously.
Live Whitby Wildfire and Smoke Map: Which Map Answers Which Question
Filterbuy Canada points readers to the live map at the top of this page first, because it shows where fires are burning and where smoke sits now. Filterbuy's guide to reading a wildfire smoke map explains each layer.
When the Map and the AQHI Disagree
The smoke layer comes from daytime satellite images, so it can't show how high the smoke is. Research co-authored by a NOAA smoke analyst found a plume overhead doesn't always mean smoky air at ground level, so Filterbuy Canada lets the AQHI decide:
Is There a Forest Fire in Whitby Today?
A forest fire inside Whitby is unlikely, because the town sits south of Ontario's forest fire region. Ontario's forest fire page asks anyone south of the French and Mattawa rivers to report wildland fires by calling 911, and Whitby Fire and Emergency Services handles grass, brush and structure fires.
The Town of Whitby's Fires By-law bans chimineas, firebowls and campfires. In the July 2026 notices Filterbuy Canada reviewed, the fire department voided every existing burn permit, citing dry conditions.
Where Whitby's Wildfire Smoke Comes From
Whitby's smoke usually travels a long way. In July 2026, an ECCC meteorologist told Wesal TV that most of Durham's smoke came from fires west and north of Lake Nipigon, which by Filterbuy Canada's calculation sits about 978 km from Whitby GO Station. Filterbuy Canada's Ontario wildfire and smoke map follows fires across that range.
Which Monitoring Station Measures Whitby's Air?
Whitby has no station in Ontario's provincial AQHI network. ECCC's reading for Southern Durham Region comes from the Oshawa station on Britannia Avenue West, which measures the AQHI's three pollutants: ozone, PM2.5 and nitrogen dioxide. Filterbuy Canada's live Whitby air quality page tracks that reading.
Because Whitby runs from the lakeshore north past Brooklin, Filterbuy Canada measured the monitor's distance from each end of town:
Method: Filterbuy Canada haversine analysis of Air Quality Ontario station coordinates.
Those distances changed how we read Whitby's AQHI. The monitor sits 161 metres above sea level, close to Brooklin's 164 metres, so it reflects north Whitby better than the neighbourhoods south of Highway 401. If the Oshawa AQHI and the Toronto East AQHI climb together, the plume is regional.
We plotted Air Quality Ontario's coordinates and found Whitby's only reading comes from north Oshawa, 3.8 km from Brooklin but nearly 10 km from Whitby GO. Our advice for lakeshore homes: check the map's smoke layer before trusting a low Oshawa number.
— Filterbuy Canada Air Quality Team
How to Read the AQHI During a Wildfire Smoke Event
The Air Quality Health Index (AQHI) is Canada's 1 to 10+ scale for the health risk of outdoor air: Low Risk (1 to 3), Moderate Risk (4 to 6), High Risk (7 to 10) and Very High Risk (above 10). Durham Region explains that a Yellow Air Quality Warning goes out when the AQHI is forecast to reach 7 or higher, and an Orange Warning when it's forecast to reach, or has reached, 10+.
Wildfire smoke can harm everyone, even at low concentrations, Durham Region notes. Headaches, a mild cough and eye, nose and throat irritation are common; chest pains, shortness of breath, wheezing and heart palpitations are more serious, so call 911 in a medical emergency. Older adults, pregnant people, young children, outdoor workers and people with heart or lung conditions face higher risk.
Supporting Statistics
Three U.S. federal sources, each from a different agency, support the steps on this page:
United Nations University / EurekAlert — Aug. 13, 2026: reports that Ontario wildfire smoke exposed people across Canada and the U.S. to unhealthy, very unhealthy, or hazardous air for nearly 106 million person-days in just three days, providing strong support for the enormous population affected. Source: EurekAlert!
Americans spend about 90% of their time indoors, and the people most sensitive to pollution spend even more. Source: U.S. EPA, Report on the Environment: Indoor Air Quality.
Adding a portable air cleaner to MERV 13 cut indoor smoke by more than half. In one home during an extreme wildfire, indoor PM2.5 averaged 55% of outdoor levels with MERV 13 alone and 22% with an air cleaner added. Source: Pacific Northwest National Laboratory, Pollutants (2024).
How to Keep Wildfire Smoke Out of Your Whitby Home
These steps follow Health Canada, Durham Region and Ontario public health advice:
Close up. Shut windows and doors. If it's hot as well as smoky, Health Canada says staying cool comes first.
Use a MERV 13 furnace filter. Ontario public health guidance recommends MERV 13 or higher, with the furnace fan running all the time. The U.S. EPA says most furnaces take MERV 13 without problems if you change it often. Just match the size on your current filter.
Add a HEPA air cleaner. Put a certified portable unit in the rooms you use most. Health Canada suggests a smoke CADR of at least two-thirds of the room's area, so a 120 square foot (11 square metre) bedroom needs 80. Skip any model that makes ozone.
No furnace ducts? In homes with baseboard heat or window units, portable HEPA cleaners do the main job. A DIY box-fan cleaner works as a short-term fix if the fan is certified, made in 2012 or later, and never left running alone or while you sleep.
Don't add smoke indoors. Skip candles, incense, frying, wood stoves and vacuuming, and limit bathroom fans.
Check filters often. Replace a furnace filter once it turns dark brown or black, even if that's early, and keep a spare.
Too hot to stay shut in? Take a break at a community centre, library or mall, as Durham Region suggests.
After the smoke clears, air out the house, wet-mop floors, use a HEPA vacuum and change smoke-loaded filters.
Choosing a Furnace Filter for Whitby's Smoke Season
At Filterbuy Canada, our action line for Whitby homes is a U.S. AQI of 100, the scale many phone apps show. At that reading, take four steps:
Switch your furnace or central air to a MERV 13 filter.
Set the thermostat fan to On so air keeps moving through the filter.
Run a portable HEPA air cleaner in each occupied room, bedrooms first.
Close the house up, with no candles, frying or smoking while the smoke is in.
The AQI 100 action line is Filterbuy Canada guidance. MERV 13 filters the whole house through the furnace, while a portable HEPA unit works harder on the room it sits in, so use both. For smoke odours, which are gases a pleated filter doesn't capture, Filterbuy Canada carries the carbon-layer Odour Eliminator line.
We flag late September for Whitby homes: a smoke-loaded filter should come out before heating season keeps the windows shut for months. Filterbuy Canada carries over 600 standard sizes plus custom sizes, ships free to every province and territory with no minimum order, and runs a subscribe and save plan you can edit, skip or cancel anytime.
See Filterbuy's guides to choosing a MERV rating, MERV 13 vs HEPA filters for wildfire smoke and setting up a cleaner air room.
"A filter only cleans air that passes through it, so seat it snugly, airflow arrow toward the furnace. During a smoke event, check it often and swap it once it turns dark brown or black."
— David Clark, Licensed HVAC Technician
Find your size and get a fresh filter in place before the next smoke event: shop MERV 13 filters at Filterbuy.ca.
Frequently Asked Questions
Is there a wildfire in Whitby right now?
Check the live wildfire map at the top of this page, including fires reported in the past 24 hours. Whitby sits outside Ontario's forest fire region, but report any fire you see by calling 911. For fires farther away, see Filterbuy's Canada wildfire and smoke map.
Is it safe to go outside in Whitby today?
Start with the Oshawa AQHI. At 1 to 3, enjoy your usual outdoor activities. At 4 to 6, people at higher risk should consider easing off strenuous activity if they have symptoms. According to Durham Region, at 7 to 10 they should reduce or reschedule strenuous outdoor activity, and above 10 they should avoid it.
What is the best live smoke map for Whitby today?
The live wildfire map at the top of this page shows current fires and smoke. Pair it with the ECCC FireWork forecast for where smoke is heading and the Oshawa AQHI for ground level.
What filter do I need for wildfire smoke, and when should I change it?
MERV 13. It's the rating the U.S. EPA recommends for central HVAC during smoke events. Replace it once the media turns dark brown or black, and set a Filterbuy Canada subscription to arrive more often during smoke season.
Glossary
AQHI (Air Quality Health Index): Canada's 1 to 10+ health-risk scale for outdoor air, based on ozone, PM2.5 and nitrogen dioxide.
Air Quality Warning: Yellow at a forecast AQHI of 7 or higher; Orange at 10+.
CADR: Clean Air Delivery Rate, the tested output of a portable air cleaner.
CWFIS: Natural Resources Canada's national active-fire data.
ECCC: Environment and Climate Change Canada, publisher of the AQHI and FireWork.
Fire region: The part of Ontario where the province manages wildland fires.
FireWork: ECCC's 72-hour wildfire smoke forecast.
HEPA: High efficiency particulate air filter, used in portable air cleaners.
HVAC: Heating, ventilation and air conditioning system.
MERV: Minimum Efficiency Reporting Value, a furnace filter's particle-capture rating.
NOAA: The U.S. National Oceanic and Atmospheric Administration, whose satellites supply the map's smoke layer.
PM2.5: Fine particles 2.5 microns or smaller, the main concern in wildfire smoke.
U.S. AQI: The United States' 0 to 500 air quality scale.