As smoke from hundreds of burning wildfires spread across Canada and the United States, the first three operational satellites in the Google-backed FireSat program successfully launched into orbit. The satellites will begin providing wildfire detection capable of spotting even small fires in the United States, Australia, and Europe before the end of the year.
The launch of the microsatellites aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California on July 7, 2026 marks a transition to “initial operational capability” for the FireSat constellation managed by the nonprofit Earth Fire Alliance. After a three-month testing period, the three satellites will begin actively providing data to fire agencies while covering every fire-prone region on Earth at least twice per day.
FireSat represents the first satellite constellation purpose-built for detecting wildfires, including spotting smaller fires that other satellites may miss. The satellites were designed by California-based satellite manufacturer Muon Space and have received over $15 million from Google to support initial deployment. Other notable financial supporters include the Bezos Earth Fund that committed $26 million.
Smoke from wildland fires pours eastward over Canada and the U.S. in an image captured on the afternoon of July 14, 2026, by the VIIRS (Visible Infrared Imaging Radiometer Suite) on the NOAA-21 satellite.
NASA Earth Observatory/Lauren Dauphin
After a slow start to Canada’s 2026 fire season, activity picked up by the end of June amid dry, warm conditions and returned closer to the 25-year average. By mid-July, almost 850 fires were actively burning across the country, according to the Canadian Interagency Forest Fire Centre. More than 180 of those were burning in Ontario.
This NOAA-21 image, acquired on the afternoon of July 14, 2026, shows smoke billowing from the Ontario fires. Winds carried the smoke primarily southeast over much of the southern part of the province, as well as parts of Quebec and the U.S. Midwest and Northeast, tinting the sky shades of gray and yellow and the Sun orange in many areas.
The smoke’s impact on air quality varied, depending largely on altitude. In areas where smoke was high in the atmosphere, air quality impacts were negligible; where it drifted closer to the ground, conditions worsened. Air quality in Toronto, for instance, reached unhealthy levels, according to AirNow. People in the southern parts of the province were also grappling with a heat wave, compounding the health risks.
Much of the smoke came from fires in Northwestern Ontario, where eight blazes saw significant growth on July 13 and 14. The fires prompted officials to issue evacuation orders for several communities in this part of the province, according to news reports.
As of July 14, fires across Canada have burned 1.9 million hectares (4.7 million acres) since the start of the year—still well below the season totals from the extreme fire years of 2023 and 2025. How the rest of the season plays out remains to be seen. A seasonal fire outlook—compiled by wildland fire experts from the U.S., Canada, and Mexico—shows where fire conditions are more or less likely through July, August, and September.
NASA Earth Observatory image by Lauren Dauphin, using VIIRS data from NASA EOSDIS LANCE , GIBS/Worldview , and the Joint Polar Satellite System (JPSS). Story by Kathryn Hansen.
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July 14, 2026
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References & Resources
AirNow (2026, July 15) Wildfires. Accessed July 15, 2026.
Smoke from wildland fires pours eastward over Canada and the U.S. in an image captured on the afternoon of July 14, 2026, by the VIIRS (Visible Infrared Imaging Radiometer Suite) on the NOAA-21 satellite.
NASA Earth Observatory/Lauren Dauphin
After a slow start to Canada’s 2026 fire season, activity picked up by the end of June amid dry, warm conditions and returned closer to the 25-year average. By mid-July, almost 850 fires were actively burning across the country, according to the Canadian Interagency Forest Fire Centre. More than 180 of those were burning in Ontario.
This NOAA-21 image, acquired on the afternoon of July 14, 2026, shows smoke billowing from the Ontario fires. Winds carried the smoke primarily southeast over much of the southern part of the province, as well as parts of Quebec and the U.S. Midwest and Northeast, tinting the sky shades of gray and yellow and the Sun orange in many areas.
The smoke’s impact on air quality varied, depending largely on altitude. In areas where smoke was high in the atmosphere, air quality impacts were negligible; where it drifted closer to the ground, conditions worsened. Air quality in Toronto, for instance, reached unhealthy levels, according to AirNow. People in the southern parts of the province were also grappling with a heat wave, compounding the health risks.
Much of the smoke came from fires in Northwestern Ontario, where eight blazes saw significant growth on July 13 and 14. The fires prompted officials to issue evacuation orders for several communities in this part of the province, according to news reports.
As of July 14, fires across Canada have burned 1.9 million hectares (4.7 million acres) since the start of the year—still well below the season totals from the extreme fire years of 2023 and 2025. How the rest of the season plays out remains to be seen. A seasonal fire outlook—compiled by wildland fire experts from the U.S., Canada, and Mexico—shows where fire conditions are more or less likely through July, August, and September.
NASA Earth Observatory image by Lauren Dauphin, using VIIRS data from NASA EOSDIS LANCE , GIBS/Worldview , and the Joint Polar Satellite System (JPSS). Story by Kathryn Hansen.
Downloads
July 14, 2026
JPEG (3.96 MB)
References & Resources
AirNow (2026, July 15) Wildfires. Accessed July 15, 2026.
Mountainous landscapes appear green and untouched by fire in a satellite image acquired on June 5, 2026.
NASA Earth Observatory/Michala Garrison
An image of the same area shows a large brown patch spanning much of the image in an image acquired after the fire on June 29, 2026.
NASA Earth Observatory/Michala Garrison
Mountainous landscapes appear green and untouched by fire in a satellite image acquired on June 5, 2026.
NASA Earth Observatory/Michala Garrison
An image of the same area shows a large brown patch spanning much of the image in an image acquired after the fire on June 29, 2026.
NASA Earth Observatory/Michala Garrison
June 5
June 29
A burned landscape spans more than 150 square miles (390 square kilometers) of rugged terrain northwest of Junction, Utah, as seen in this pair of images captured by the OLI (Operational Land Imager) on Landsat 8 and Landsat 9 on June 5, 2026 (left) and June 29, 2026 (right). NASA Earth Observatory images by Michala Garrison.
After a winter of below-average snowpack and an unusually warm and dry start to summer, the National Interagency Fire Center warned that the Great Basin and parts of the Rockies faced an elevated risk of wildfires in July 2026.
The warning proved accurate. By July 7, firefighters labored to contain nearly three dozen large, early-season wildland fires that raced through forests in several parts of the western U.S. Utah was among the most active states, with fires having charred 558 square miles (1,445 square kilometers) and four major fires that were not fully contained still burning.
The Cottonwood fire ranked as one of Utah’s—and the country’s—largest and most destructive fires of the year so far. As of July 7, it had burned 150 square miles (390 square kilometers), just shy of the Babylon fire in eastern Utah. Landsat 9 captured the false-color image (bands 7-5-4) above (right) on June 29, 2026, when blackened vegetation spanned a large patch of rugged terrain along the Beaver River. The image on the left shows the same area on June 5, a few weeks before the fire ignited. In this band combination of shortwave infrared, near infrared, and visible light, unburned vegetation appears bright green, snow is blue, and clouds are white.
Ponderosa pine, oak, sagebrush, and grasses were among the vegetation types that burned. Officials with the state’s forestry division told news media that the Cottonwood fire had destroyed up to 150 structures. Eagle Point Ski Resort, which lost more than 100 condos and 30 cabins, also reported damage to four of its five chairlifts.
The damage to forests was extensive, though isolated patches survived largely unscathed, remaining as green oases within the broader burned area. Among them were the forests around Tushar Campground, the site of a 4-H summer camp. Beaver County officials credited years of forest treatments, such as clearing brush and trimming branches, with helping save the campground and surrounding forests.
The fire spreads especially rapidly on June 23 and June 26. The fire perimeters in this visualization are based on data from NASA’s Fire Events Data Suite.
NASA Earth Observatory/Michala Garrison
As the fire spread, NASA’s Fire Events Data Suite (FEDS) tracked its progression and rate of growth. The visualization above, based on the FEDS system, shows the fire surging on June 23 and tripling in size over 12 hours that day as it spread to the north, east, and south. It also grew rapidly on June 26, when it made a run to the north. FEDS draws on data from the VIIRS (Visible Infrared Imaging Radiometer Suite) sensors aboard the Suomi NPP, NOAA-20, and NOAA-21 satellites, which detect active fires day and night by their thermal infrared signature.
FEDS is one of several tools available to firefighters and emergency management officials when responding to fires. First responders often rely on higher-resolution airborne imagers or on firefighters walking fire edges to map perimeters. FEDS offers a different advantage: consistent, easily accessible data that do not need to be specially requested, according to Tempest McCabe, a University of Maryland scientist based at NASA’s Goddard Space Flight Center who helped develop the tool. As a result, FEDS often detects a fire’s start earlier than other sources and tracks blazes for their full duration. To capitalize on strengths like these, the FEDS team is working closely with operational fire behavior analysts, with support from NASA’s FireSense program, to better understand and anticipate periods of rapid fire spread.
A total of 1,289 firefighters have been deployed to the Cottonwood fire, according to InciWeb, a website managed by the National Interagency Fire Center. As of July 7, the fire was 56 percent contained, but forecasters expect a hot, dry weather pattern to persist in the coming days, with fire behavior likely to be “very active to extreme” over the next 72 hours.
Government satellite data are part of a global system of observations used to track fire behavior and analyze emerging trends. Among the real-time wildfire monitoring tools that NASA makes available are FIRMS (Fire Information for Resource Management System), the Worldview browser, and the Fire Event Explorer.
As of July 7, 2026, fires had burned 5,265 square miles (13,636 square kilometers) across the United States, according to the National Interagency Fire Center. That’s 46 percent more than the 10-year average (2016-2025) for that point in the season.
NASA Earth Observatory images by Michala Garrison, using Landsat data from the U.S. Geological Survey and fire perimeter data from the Fire Events Data Suite. Story by Adam Voiland.
Smoke streams from fires in Australia’s Northern Territory in an image captured by the MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA’s Aqua satellite on May 28, 2026.
NASA Earth Observatory/Michala Garrison
In May and June of most years, NASA satellites typically begin to detect large numbers of wildland fires throughout the Top End and Arnhem Land regions of Australia’s Northern Territory. On some days, especially in the afternoon, the blazes can resemble sizable wildfires in satellite imagery, spreading widely and producing expansive smoke plumes.
That was the case when NASA’s Aqua satellite acquired this image of smoke and fires on the afternoon of May 28, 2026. Often, however, fires burning in this area look smaller and less imposing. In the mornings just a few days earlier and later, for instance, NASA satellites detected little smoke despite observing many thermal anomalies, or hotspots, that indicated fire activity.
The pattern of burning, location, and timing are consistent with prescribed fires lit intentionally to manage the landscape. Land managers tend to light fires in the morning, and smoke builds over the course of the day. The process sometimes creates sizable plumes when there are updrafts and winds of moderate strength that carry smoke away from the fires, as happened on May 28 and again on June 2. The fires typically burn through the fire-adapted grasses, underbrush, and scattered trees in the region’s tropical savanna ecosystems.
Over the past few decades, the region’s land managers have combined deep-rooted Indigenous land management practices and modern technologies to establish large-scale landscape management programs such as the West Arnhem Land Fire Abatement project and Arnhem Land Fire Abatement. The goal of such efforts is to intentionally burn some of the savanna underbrush to create firebreaks and reduce fuel loads early in the dry season, reducing more destructive and emissions-intensive fires later in the season. The dry season generally begins in May and extends through September, according to Australia’s Bureau of Meteorology.
While research is ongoing, there are signs that the prescribed burning efforts are having the intended effect. Analysis of satellite observations of the fires suggests that prescribed burning efforts have shifted fire activity from late to early in the dry season, leading to a reduction in high-intensity fires and emissions.
NASA Earth Observatory image by Michala Garrison, using MODIS data from NASA EOSDIS LANCE and GIBS/Worldview. Story by Adam Voiland.
NASA-Funded Study Shows Wildfire Smoke’s Hidden Ozone Toll
Canadian wildfire smoke carried carbon monoxide — a building block of ground-level ozone — thousands of miles downwind in June 2023.
Credits: NASA’s Goddard Space Flight Center
Wildfire smoke is stoking a new challenge for cleaner air. A NASA-supported study published Thursday found that, over the last decade, wildfires have worsened ground-level ozone pollution across much of the contiguous United States, creating unhealthy air far from active flames.
Wildfires have become an increasingly important contributor to ground-level ozone, or smog, across much of the United States, researchers report June 4 in the journal Science. Nationally, fires offset nearly four years’ worth of ozone-control gains, with larger setbacks in the West and Midwest.
Smoke often is associated with the soot, ash, and other fine particles that make the air look hazy. But wildfires also emit gases such as carbon monoxide, which can help form surface ozone in sunlight when other pollutants are present. Surface ozone is an invisible pollutant harmful to human health, plants, and crops. As smoke plumes travel and mix with other pollution, those reactions can drive ozone increases hundreds or even thousands of miles from active fires.
“NASA Earth observations, along with ground monitoring networks, help reveal air quality risks from wildfires that can cross state lines, giving air quality managers better decision-making information as wildfire smoke affects more communities,” said John Haynes, manager of NASA Earth Action’s Health and Air Quality program at the agency’s Headquarters in Washington. “This is a strong example of NASA science serving communities here in the U.S.”
Building a clearer ozone picture
High in the atmosphere, ozone shields Earth from harmful ultraviolet radiation. Near the ground, however, ozone can irritate lungs, worsen asthma and other respiratory diseases, and increase health risks for children, older adults, outdoor workers, and people with existing health conditions.
To track surface ozone changes, researchers turned to deep learning, a form of artificial intelligence that finds patterns across large datasets. They used it to build a first-of-its-kind dataset estimating daily surface ozone from 2003 to 2024 on a kilometer-by-kilometer grid — about 0.6 miles on each side — across the contiguous U.S. The work received support from NASA’s Health and Air Quality program and other NASA grants.
The scientists combined data from about 1,000 ground-based air quality stations with atmospheric model data, weather information, wildfire pollution data, and satellite-derived information, including products from the Visible Infrared Imaging Radiometer Suite (VIIRS) and the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments.
Smoke from Canada’s 2023 wildfires spread across North America. Tan to deep red colors show smoke intensity, estimated from black carbon in NASA’s GEOS-FP model.
NASA’s Scientific Visualization Studio (SVS) and NASA’s Global Modeling Assimilation Office (GMAO)
Their analysis revealed two distinct periods. From 2003 to 2015, U.S. ground-level ozone generally declined as emissions of ozone-forming pollutants decreased. After 2015, however, those gains slowed or reversed in many places. By comparing estimated ozone levels with scenarios that removed wildfire influence, the researchers found that pollution from wildfires was a main factor in that shift.
Without the wildfire contribution, ground-level ozone in the Midwest, for example, would likely have continued to decline. Instead, wildfires erased about 5.3 years’ worth of ozone-control progress since 2015.
“People in the Midwest may think fires burning far away will not affect them,” said the study’s corresponding author Jun Wang, an atmospheric scientist at the University of Iowa in Iowa City. “But once wildfire pollution is in the air, it can move across regions. Pollution from one place can affect air quality in another.”
Measuring the health toll
The study also found that wildfire-driven ozone increased exposure to unhealthy air and likely contributed to premature deaths. Premature deaths associated with long-term wildfire-related ozone exposure in the U.S. increased by an estimated 318 deaths per year after 2013, with the post-2013 average 46% higher than in the previous decade. The researchers calculated premature deaths using average lifespan, ozone exposure estimates, and population density.
The 2023 Canadian wildfires showed how widely those risks can spread, with smoke-driven ozone increases stretching across the Midwest and into parts of the Northeast and South. Overall, from 2022 to 2024, wildfires exposed an additional 43 million people in the U.S. to conditions that did not meet current federal air quality standards for ozone, the researchers estimated.
Capturing that national picture is difficult from ground monitors alone. Ground monitors remain the backbone of U.S. air quality tracking, but they do not cover every community. NASA’s scientifically validated satellite observations and models help researchers and agencies see air quality patterns across states, regions, and fire seasons.
That broader air quality work includes newer missions such as TEMPO (Tropospheric Emissions: Monitoring of Pollution). Launched in 2023, TEMPO is NASA’s first mission to use a space-based spectrometer to provide hourly daytime measurements of air quality over North America. Its view is sharp enough to distinguish pollution patterns, including surface ozone, across areas only a few square miles wide, a major improvement over earlier satellites.
Together, these capabilities help researchers and agencies see smoke-related ozone patterns that might otherwise be harder to detect, especially in rural and remote areas.
The work also points toward a practical use of NASA science during fire season. Wang’s team has used NASA support to develop FireAQ, a decision-support system that brings satellite observations, model forecasts, and fire and aerosol products into weekly briefings with state and local air quality officials. The goal is to help officials see where smoke-related pollution may move next and give communities better information.
Pacific Palisades, Calif., on Jan. 7, 2025. Fires in the Los Angeles area last year burned at least 90 square miles, killing at least 31 people and displacing more than 150,000.
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