Officials warned young children and those with respiratory illnesses to take precautions. For weeks, smoke from Canadian wildfires has been drifting across the border.

New York was hit with an air quality alert Saturday as smoke from Canadian wildfires drifted across the state, pushing levels of fine particulate pollution into the unhealthy range for sensitive groups.

According to the BBC, State officials revealed that the air quality index is expected to top 100, with some areas pushing 135. Numbers like that mean the air can irritate lungs and trigger asthma or heart problems. Parts of New England are also dealing with the same conditions.