The impact of the smoke was less severe than earlier this month and was most strongly felt in cities from Pittsburgh and Cleveland to Chicago and Detroit.
In New York, officials warned residents of a potential replay of the smoke crisis that gripped the state earlier this month, when the air quality index in the New York City metro area registered above 400.
Many N Y Cities Are Under Air Quality Alerts as Smoke Drifts East nytimes.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nytimes.com Daily Mail and Mail on Sunday newspapers.