Air quality across the Northeast has deteriorated significantly as smoke from Canadian wildfires spreads throughout the region, prompting officials to issue multiple air quality alerts. New York City, along with areas in New Jersey, Pennsylvania, and Maine, is experiencing unhealthy air conditions, with some locations even ranking among the most polluted in the world. As a result, health advisories have been declared, urging residents to monitor their conditions and take precautions against possible respiratory issues. The hazardous effects of the wildfire smoke are expected to persist over the weekend, with additional storms and heat likely complicating the situation further.