An air quality alert was issued by the New York State Department of Health on Saturday due to smoke from wildfires in Canada.

New York City, Long Island and the Hudson Valley will all experience air quality within the 101-150 range on the air quality index Sunday, the state’s Department of Environmental Conservation forecasted—meaning the air could contain fine particles and could be “unhealthy for sensitive groups.”

An air quality alert will continue for a second day in New York City and the surrounding area. Officials are warning of poor air quality all day Sunday due to wildfires in Canada. The Air Quality Index is expected to exceed 100.