Massachusetts issued an Air Quality Action Day for fine particulates on July 17, 2026, during smoky and hazy conditions affecting southern New England, including the Boston area.
Wildfire smoke transported into western Michigan affected air quality in the Grand Rapids area on July 18, when National Weather Service Grand Rapids displayed Air Quality Alerts across its forecast area.
Montana DEQ listed Helena’s particulate pollution as Unhealthy for Sensitive Groups at 9 a.m. July 27, while National Weather Service forecasts called for smoke and highs near 94 and 102 degrees.
A July 18 Code Orange air-quality alert covered Manchester and other parts of southern New Hampshire through 11 p.m., with officials advising sensitive residents to reduce strenuous outdoor activity.
Nashua was among the southern New Hampshire communities covered by a Code Orange particle-pollution alert that remained in effect until 11 p.m. EDT on July 18, 2026.
United States Weather Safety and Emergency Alerts – NWS Air Quality Alerts for wildfire smoke are time-sensitive. Here’s how to read them and reduce exposure.
Los Angeles CA — After June 25 knockdown, city and AQMD guidance still told Boyle Heights residents to limit smoke exposure; schools moved through June 24.
