St. Mary’s County officials issued a Code Red Air Quality Alert Friday, July 17, warning residents that pollution levels have reached unhealthy conditions for the general population due to drifting smoke from Canadian wildfires.
The St. Mary’s County Department of Emergency Services alerted the public that air quality in the area is unhealthy, recommending that everyone limit strenuous outdoor activity or exercise. Sensitive groups — including children, older adults and people with respiratory or heart conditions — face heightened risks and should take extra precautions to avoid exposure.
Code Red corresponds to Air Quality Index values between 151 and 200, meaning some members of the public may experience health effects while sensitive individuals could face more serious impacts. Symptoms may include coughing, shortness of breath, irritated eyes or throat, and fatigue, particularly when combined with above-normal temperatures.
The alert stems from more than 100 wildfires burning in western Ontario, Canada, sending plumes of smoke southward. Combined with elevated ozone levels from heat and sunlight, the pollution has created widespread hazy skies and potential smoke odors across St. Mary’s County and much of the Mid-Atlantic. Regional reports indicate hundreds of active fires across Canada, with smoke affecting more than a dozen U.S. states from the Midwest to the Northeast.
Local residents may notice reduced visibility, orange-tinged sunrises or sunsets, and a distinct smoky smell. Officials stress that any suspected local fire should be reported immediately by calling 9-1-1 rather than attributing it solely to distant wildfires.
Health experts emphasize protecting vulnerable populations. Fine particulate matter (PM2.5) from wildfire smoke can penetrate deep into the lungs and bloodstream, exacerbating asthma, chronic obstructive pulmonary disease, cardiovascular issues and other conditions. Children breathe more air per body weight and often spend more time outdoors, while older adults may have reduced lung function.
St. Mary’s County Health Department resources, including the BreatheWell St. Mary’s initiative, provide real-time monitoring and guidance. Residents are encouraged to check air quality forecasts regularly through AirNow.gov or local dashboards.
Protective steps include staying indoors with windows closed, using high-efficiency air filters or purifiers, and wearing a well-fitted N95 or KN95 mask during necessary outdoor time. Limit or reschedule outdoor work, sports and recreation. Sensitive individuals should follow personal action plans, keep medications handy and consult healthcare providers if symptoms worsen.
This event fits a pattern of increasing long-range smoke impacts on the East Coast in recent years, as hotter, drier conditions fuel larger wildfire seasons in Canada. Previous episodes have demonstrated how smoke can linger or recur depending on wind patterns, sometimes persisting for days before a frontal system clears the air.
St. Mary’s County, with its mix of rural, coastal and suburban areas, faces unique challenges as smoke settles near the Chesapeake Bay region. Outdoor workers, farmers and those enjoying summer activities on the water or trails are particularly exposed. Schools and organizations may adjust recess, practices or events based on local guidance for youth.
The Department of Emergency Services directs residents to www.stmaryscountymd.gov/em for emergency preparedness information, including tips for extreme weather and pollution events. A shift in weather patterns, potentially including weekend storms, could help disperse the smoke, but officials advise monitoring updates closely through the weekend.
By staying informed and taking simple protective measures, St. Mary’s County residents can minimize health risks during this Code Red period while the region contends with the far-reaching effects of distant wildfires.
