The wildfire smoke choking cities across the country might disrupt flights at major international airports

Philadelphia and Baltimore registered some of the worst air quality readings in the US with the level exceeding 300 on Thursday, a number considered hazardous, according to the Environmental Protection Agency’s AirNow map. Manhattan recorded in the 200 range — but New York’s Mayor Eric Adams warned the unprecedented conditions could again deteriorate and urged people to take precautions. 

Washington, DC, was under a “Code Purple” air quality alert, indicating “very unhealthy air conditions for the entire public,” according to the office of Mayor Muriel Bowser.

“Based again on the forecast that the National Weather Service is putting out, we could see the winds that are pushing the smoke south from Canada begin to shift,” said Christopher Rodriguez, director of DC’s Homeland Security and Emergency Management Agency. “So that will ease again some of the air quality challenges that we’re facing into the weekend.”

Inbound flights to New York’s LaGuardia Airport were grounded for a second day due to low visibility, while the Federal Aviation Administration warned that flights could also be halted at JFK, Newark and Teterboro. 

The haze is expected to last into Monday or Tuesday before the larger weather pattern pumping smoke south from Canada starts to break up, according to Zack Taylor, a senior branch forecaster with the US Weather Prediction Center. The plume itself covers most of North America and in the long term, the only real solution will be if the fires in Canada are brought under control.

For now, dystopian scenes gripped those in cities unfamiliar with this type of pollution, which is far more prevalent in Asia and increasingly affects parts of North America. Historic wildfires have blanketed large parts of Northern California in smoke in recent years and turned San Francisco’s skies orange in 2020.