Wildfire

Air pollution has changed over time, with sources evolving from wood burning and smelting to widespread fossil fuel use, industrial emissions, and intensified wildfires.

While global burned area from wildfires has declined due to land use changes, many regions are experiencing more intense fire seasons, with more people living in high-risk areas.

In 2025, wildfire activity has varied across regions, with some areas seeing drier weather and more severe fire seasons than usual. Changing climate conditions continue to increase wildfires and affect air quality worldwide.

Wildfire smoke contains a complex mix of harmful pollutants, such as ozone precursors, carbon monoxide, and particulate matter like PM2.5 and black carbon. These pollutants can affect health and travel far from the fire source.

Air pollution affects millions every year, but there are simple, effective ways to protect yourself, especially during events like wildfires. Learn how to read the AQI, reduce exposure, and improve indoor air quality.

Decades of intensive fire control have actually made forests more vulnerable to severe wildfires. Controlled burns provide a safer and cost-effective way to reduce risk, restore ecosystems, and build long-term wildfire resilience.

We’re proud to share that Clarity has become the second commercial air quality PM2.5 sensor to be approved for inclusion on the AirNow Fire and Smoke Map (FASM), following years of technical collaboration and data validation alongside U.S. EPA.

Wildfires carry hidden costs that extend beyond immediate damage. They strain public health systems, disrupt employment, and drive up nearby housing costs. Proactive strategies can help reduce these long-term financial impacts.

Wildfire season varies across the U.S. As climate change drives longer, more intense fire seasons nationwide, once-localized risks now threaten public health, ecosystems, and air quality across the country.

Air pollution in the U.S. rises significantly during the Fourth of July due to fireworks, increased travel, and backyard grilling. Sustainable celebrations and air quality monitoring can help lessen the harmful impact.