The U.S. Senate has unanimously passed companion legislation to a wildfire emissions bill championed by Colorado Rep. Gabe Evans, moving a bipartisan push to reshape how prescribed burns and out-of-state smoke count against the state's air quality record one step closer to the president's desk. The package now heads back to the U.S. House, where lawmakers will need to approve the final version before it can be signed into law.
Evans, who represents Colorado's 8th Congressional District, sponsored the original House measure, known as the Fire Improvement and Reforming Exceptional Events Act, or the FIRE Act. According to the Denver Gazette, Evans welcomed the Senate's unanimous approval of the compromise package, which he said would expand efforts to include prescribed burns in the exceptional events process while protecting jobs and economic activity.
The Senate side of the effort, the Wildfire Emissions Prevention Act of 2026, is sponsored by Sen. John Curtis of Utah and Sen. Shelley Moore Capito of West Virginia. The bill would amend the Clean Air Act to exclude emissions from prescribed burns from states' air quality compliance metrics, according to the Denver Gazette. Curtis' office, in a statement, noted the measure moved through committee with broad support, saying, “This bill passed the Environment and Public Works Committee unanimously, 19-0,” according to Sen. Curtis' office.
A Bill Born From a Partisan House Vote
The House version of the legislation did not have an easy path. Lawmakers passed Evans' FIRE Act on a 220-198 vote in April, with eight Democrats joining Republicans in support and one Republican voting against it, according to Colorado Public Radio. Colorado's own delegation split along party lines, with every Colorado Republican voting for the bill and every Colorado Democrat voting against it, the outlet reported.
The legislation modifies the Clean Air Act's definition of exceptional events, broadening it to include actions intended to mitigate wildfire risk, such as prescribed burns, per the same report. It also would let human-caused events that are designed to mirror a natural occurrence — like a controlled burn standing in for a lightning-sparked fire — qualify for that same exceptional-events classification. Under the Denver Gazette's summary of the compromise, the final package includes prescribed burns, drought and out-of-state smoke transport as exceptional events.
Evans Pointed to Out-of-State Smoke
When the House bill passed in the spring, Evans argued the Front Range has long struggled to meet Clean Air Act ozone-attainment levels, pointing to data he said showed 70% of the emissions come from sources out of state. He framed the legislation as a fix for that imbalance, saying it would ensure states like Colorado are not punished for smoke and emissions they cannot control, the station reported.
Evans also touted support from stakeholder groups including the Western Governors Association, the Colorado Petroleum Association and the Colorado Association of Home Builders, according to Colorado Public Radio's April report. Democratic opponents pushed back hard, arguing the bill could weaken Clean Air Act protections by letting drought, heat and other conditions get cited in air-quality compliance reviews — with critics contending, in CPR's words, that the FIRE Act would give polluters a free pass on the Clean Air Act.
Federal Agencies Already Treating Prescribed Fire as Mitigation
The legislative push has unfolded alongside separate federal guidance on how to handle air-quality data tied to prescribed fires. The U.S. Environmental Protection Agency has noted that exceptional events may include wildfires, high-wind dust events, prescribed fires, stratospheric ozone intrusions, and volcanic and seismic activities, according to the EPA. Separate EPA guidance is intended to help air agencies prepare demonstrations under the Exceptional Events Rule for prescribed fires that influence ozone and particulate matter concentrations, the agency has said.
The text of the Senate bill itself, as introduced, describes its purpose plainly: to amend the Clean Air Act to modify the handling of air quality monitoring with respect to prescribed fires, according to the bill text posted on Congress.gov. In July, Evans' office announced the introduction of Senate companion legislation to the FIRE Act, months before the Senate's Tuesday, Sept. 29, 2026, vote.
What Happens Next
Evans has said the compromise package would give states room to take proactive steps to improve air quality without facing penalties for emissions outside their control, while also providing regulatory certainty for communities. Per the Denver Gazette, Evans hopes the package will quickly return to the House for final passage, after which it would be sent to the president for signature.
That next House vote is the remaining hurdle. Whether the chamber takes it up quickly, and whether the same partisan divide that defined April's 220-198 vote resurfaces, will determine how soon — or whether — the measure reaches the president's desk.
