Updated on February 18, 2026, at 6:40 AM ET — The metropolitan region is under an air quality health advisory due to a combination of thick morning fog and stagnant air, raising concerns particularly for vulnerable populations. Officials predict that fine particulate levels are likely to elevate the Air Quality Index beyond 100 in several counties, which poses increased risks for sensitive groups.
The current air quality issues stem from two specific weather-related factors. A dense fog advisory is in effect for parts of southern Connecticut, northeastern New Jersey, and southeastern New York through mid-morning, resulting in visibility dropping to a quarter-mile or less in certain areas. Such fog and low clouds indicate a stable, moist layer close to the ground.
Additionally, light winds have led to a relatively stagnant atmosphere that traps pollutants at ground level, causing fine particulate matter (PM2.5) to build up. Officials anticipate outdoor PM2.5 concentrations will push the region’s Air Quality Index into the 100–150 range, categorized as “unhealthy for sensitive groups.” This poses particular concerns for children, older adults, pregnant individuals, and those with pre-existing heart or lung conditions, who may experience symptoms like throat or eye irritation and exacerbated breathing or cardiac issues.
While wildfire smoke from distant fires could contribute to the situation, local sources such as vehicle exhaust, heating emissions, and other combustion-related activities also play a significant role in worsening air quality. Without stronger winds to disperse these pollutants, they tend to accumulate under the current calm conditions.
Individuals classified as sensitive should reduce prolonged or heavy outdoor activities while the advisory is active. The general public is advised to minimize time spent outdoors until the winds pick up or rain arrives to cleanse the atmosphere. Authorities have indicated that the air quality alert will persist until midnight in many areas, with possible extensions if conditions fail to improve.
Practical measures to limit exposure include remaining indoors with windows and doors shut, avoiding strenuous outdoor exercise, and postponing activities that generate smoke or additional particles, such as burning yard waste or using gas-powered equipment. Anyone experiencing new or worsening respiratory symptoms is encouraged to reach out to their healthcare provider.
Drivers should also be cautious; the morning fog advisory is set to last until 10:00 AM ET in affected corridors, resulting in pockets of very low visibility. Motorists are urged to drive slowly, use headlights (not high beams), and maintain increased distances between vehicles. Authorities warn that bridges and overpasses may have the lowest visibility, and drivers should prepare for abrupt changes in conditions.
The combination of poor air quality and limited visibility presents significant challenges, particularly for those with respiratory sensitivities and all motorists navigating the roads. If travel is necessary, it is wise to allocate extra time, avoid known fog-prone areas, and consider alternative routes.
Officials are actively monitoring the situation and will provide updates as conditions evolve. Should winds strengthen or precipitation arrive later in the day, a reduction in particulate concentrations and an overall improvement in air quality are anticipated.