What does Code Red air quality mean? Weather Talk explains – WBAL-TV

Maryland Department of the Environment Issues Code Red for July 17

Code Red Alerts and Health Risks Across Maryland

The Maryland Department of the Environment (MDE) has escalated its warnings as smoke from Canadian wildfires drifts into the region. While a Code Orange alert—deemed unhealthy for sensitive groups—was in place on Thursday, officials have elevated the status to a Code Red for Friday, July 17. According to WBAL-TV, a Code Red classification indicates that air quality is unhealthy for the general population, not just those with pre-existing conditions. MDE experts have noted that some air quality alerts may extend into Saturday.

The health risks associated with these conditions are multifaceted. Dr. Panagis Galiatsatos, a pulmonologist at Johns Hopkins Medicine, noted that even healthy individuals may face irritation, while those with underlying vascular or heart conditions are at heightened risk of complications. Symptoms of poor air quality can include coughing, wheezing, stinging eyes, headaches, runny nose, and chest pain. It is pretty common to see after bad air quality days, three or four days later or a week later, patients coming into the emergency room with chest pain or a stroke because they've developed these vascular complications, Galiatsatos told WBAL-TV.

Environmental Protection Agency Defines Air Quality Index Scale

Understanding the Air Quality Index (AQI) Scale

The Air Quality Index (AQI) acts as the primary tool for communicating these risks. Managed by the Environmental Protection Agency (EPA), the scale ranges from 0 to 500. As noted by Mehak Gandhi, MD, with Hartford HealthCare Medical Group, the index does not measure existing lung damage but rather the immediate health risk posed by pollutants like ground-level ozone and fine particle matter. The AQI does not measure how much damage has occurred in your lungs, Dr. Gandhi says. It tells you how concerning the current air may be and who is most likely to feel its effects.

The EPA provides the following guidance on the AQI scale:

• 0–50 (Good): Satisfactory air quality; poses minimal to no risk to humans.
• 51–100 (Moderate): Acceptable air quality; individuals particularly sensitive to air pollution may be at risk.
• 101–150 (Unhealthy for Sensitive Groups): Sensitive groups may experience health effects, while the general public is less likely to be affected.
• 151–200 (Unhealthy): The general population is more likely to experience health issues, and sensitive groups are at risk of serious health concerns.
• 201–300 (Very Unhealthy): The high risk of health concerns extends to the general public.
• 301–500 (Hazardous): Everyone who inhales air at this level is likely to be affected.

Recent extreme events have seen AQI levels surge far beyond standard projections. In Detroit, for instance, levels reached as high as 754 on a Thursday morning, according to air-quality tracker IQAir. While the EPA classifies any AQI above 300 as hazardous, IQAir’s scale can climb past 500 in extreme wildfire scenarios.

Joel Dreessen Advises Residents to Limit Outdoor Exposure

Safety Precautions and Limitations of Masks

Health officials and atmospheric scientists are urging residents to adapt their routines to limit exposure. Joel Dreessen, an air quality meteorologist and deputy program manager for MDE’s Air Monitoring Program, emphasized that individuals should avoid strenuous outdoor activity when concentrations are elevated. Plan your day accordingly to limit your exposure, and if you do have to be outside, find ways to limit the amount of air that you're breathing over time, Dreessen told WBAL-TV. You don't need to be exercising when concentrations are at unhealthy levels.

Dave Sakin Monitors Weather Conditions for Value Remodeling Crews

While some residents may instinctively reach for face masks, experts warn against relying on them for this specific type of pollution. Regarding the particles in the air, Dr. Galiatsatos warned that masks are not likely to provide the necessary protection. Furthermore, for those managing outdoor work crews, the recommendation is to prioritize safety over productivity. Dave Sakin, owner of Value Remodeling, a deck, roofing, and siding business, noted that he monitors weather conditions to protect his crews. If it looks like it's going to be too warm, I discuss with them, 'If you don't feel well, leave,' Sakin told WBAL-TV. Nothing we're doing is an emergency, so it's best for them not to have an emergency.

Beyond limiting outdoor time, experts suggest keeping windows closed and using air recirculation settings in vehicles to minimize the intake of smoky air. Because health responses can depend on individual underlying health conditions, residents concerned about their specific risk level should consult with a qualified medical professional.