Canadian Wildfires Cause Hazy and Unhealthy Air Across Northeastern US, Affecting Landmarks and Sporting Events.

Smoke from Canadian wildfires has blanketed New York City, causing hazardous levels of air pollution and prompting a health warning for residents with breathing issues. Air quality levels throughout the city were "very unhealthy," and outdoor activities were discouraged. The smoke could last for days, and meteorologists suggest taking precautionary measures to safeguard oneself. The unhealthy air seeping through the city was caused by smoke that originated from a fire last week in Nova Scotia that has affected the quality levels from New York City to Washington DC.