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[24]Science / Science & Exploration

Wildfire smoke and haze in the Eastern United States should peak this week

New York City had the worst air quality in the world on Tuesday.

  by [25]Eric Berger - Jun 7, 2023 1:30 pm UTC
  [26]59

  [GettyImages-1258495344-800x533.jpg]
  The Downtown Manhattan skyline stands shrouded in a reddish haze as a
  result of Canadian wildfires on June 6, 2023.
  Lokman Vural Elibol/Anadolu Agency via Getty Images

  There is nothing new about Canadian wildfires in the spring and summer,
  but what is extraordinary about this year's fires is that so many are
  active in Quebec, the country's largest province. Typically wildfire
  season in Canada affects mostly western provinces, such as Alberta.

  However, this year nearly half of the 423 active wildfires in Canada
  are in the eastern part of the country, according to the [27]Canadian
  Interagency Forest Fire Centre. Many of these fires are located within
  a few hundred kilometers of the border with the United States, and with
  a northerly flow in place, the smoke and haze has swirled down into the
  Eastern United States.

  The effects have been profound. On Tuesday, for a time, [28]IQ Air
  ranked New York City as having the worst air quality in the world,
  above cities like Delhi, India, and Dhaka, Bangladesh. As of Wednesday
  morning, New York only had the second worst air quality in the world.
  On a normal day, it would not rank among the top thousand cities.

  Such air, with small particles, is unhealthy. Officials and physicians
  in New York City have urged residents to remain indoors or wear a mask
  if they venture outside. For people who are outdoors for an extended
  period of time, there are serious respiratory issues and other health
  concerns, [29]physicians said.

  Air quality problems on Wednesday are likely to be worse farther south
  in the United States, in areas such as New Jersey and the District of
  Columbia, due to prevailing wind patterns. A low-pressure system over
  the northern Atlantic Ocean is driving a northerly flow of winds over
  Canada and down into the United States.

  Models of smoke patterns, vertically integrated through the atmosphere,
  suggest that this flow will reach its greatest extent on Wednesday and
  Thursday, with the Mid-Atlantic states seeing the worst effects then.
  Major cities at risk include Philadelphia, New York, and Washington,
  DC. Overall the effects could be widespread, with smoke and haze
  trailing as far south as into the Carolinas.

  The overall wind pattern should begin to shift toward the weekend,
  pushing more of the smoke and haze offshore, into the Atlantic Ocean.
  This should provide some relief to the Eastern United States.

  So far, in Canada, about 10,000 residents in Quebec have been forced to
  evacuate due to these wildfires, and nearly 100,000 acres have been
  burned to date. Overall, the Canadian wildfires observed this year,
  across the country, have set records for their extent and duration. A
  total of more than 125,000 people have been forced to evacuate.

  The fires have been exacerbated by dry and hotter-than-normal
  conditions this year. Climate scientists say these more intense and
  extended wildfire seasons will become more likely as the planet warms
  and droughts worsen.

  [30]Expand full story

  [31]Reader comments 59

  [32][berger100-2.jpg]

  [33]Eric Berger / Eric Berger is the senior space editor at Ars
  Technica, covering everything from astronomy to private space to wonky
  NASA policy, and author of the book [34]Liftoff, about the rise of
  SpaceX. A certified meteorologist, Eric lives in Houston.
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