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Air Quality Forecast

2026 Wildfire Season Outlook: Which States Face the Highest Air Quality Risk

Published: 2026-06-11 · 7 min read

The National Interagency Coordination Center (NIFC) is warning that nearly every western state should expect above-normal significant wildfire potential at some point between April and July 2026. The driver is a familiar but intensifying pattern: record-low mountain snowpack, an unusually early snowmelt, and record-high spring temperatures that dried out vegetation weeks ahead of schedule.

For anyone tracking outdoor air quality — whether you have asthma, run or cycle outdoors, or just want to plan around smoke days — this outlook matters because wildfire smoke is now one of the single biggest drivers of PM2.5 spikes across the country, even in regions thousands of miles from the actual fires.

Where the Risk Is Highest, Month by Month

  • April-May: Above-average significant fire potential concentrated in New Mexico, with parts of Arizona, Colorado, and Wyoming also elevated.
  • June: The footprint expands across much of the West, with the Four Corners region (Arizona, New Mexico, Colorado, Utah) and large parts of the Northwest particularly affected.
  • July-September: Risk typically broadens into the Great Basin, the Rockies, northern California, and the Inland Northwest as fuels continue to dry.
  • Southern/Central California: Forecast near-normal through July, despite minimal March rainfall and record-low dead-fuel moisture — a status worth watching closely as the season progresses.

It's Not Just the Western States

Smoke doesn't respect state lines. In recent summers, plumes from Canadian wildfires have pushed PM2.5 to "unhealthy" and "very unhealthy" levels as far away as the Upper Midwest, the Great Lakes, the Northeast, and even parts of Europe. Minnesota's state climatologists are forecasting 12 to 16 days of wildfire smoke impact this summer alone, on top of 4-6 days of unhealthy ozone.

If you live in the Midwest, Great Lakes, or Northeast, this outlook is just as relevant to you as it is to residents of Boise or Sacramento — smoke transport events can spike your local AQI from "Good" to "Unhealthy" within a few hours.

How to Prepare Before Smoke Arrives

  1. Bookmark your city's AQI page so you can check current and forecast conditions in seconds. Start with your city air quality report.
  2. Set up a clean room. Pick one well-sealed room, run a HEPA purifier sized for that square footage, and keep windows/doors closed during smoke events.
  3. Stock N95 or P100 respirators — cloth and surgical masks do not filter PM2.5 effectively.
  4. Set HVAC to recirculate and upgrade to a MERV 13+ filter if your system supports it.
  5. Plan outdoor activity around forecasts, not just current readings — smoke plumes can arrive within hours of a "Good" reading.
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Note: Wildfire outlooks describe probability of fire activity, not a guarantee of smoke impacts in any specific location. Always check real-time AQI data before making health decisions.