Why is it so blurry? The smoke of forest fires brings red skies, health warning,

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Why is it so blurry? The smoke of forest fires brings red skies, health warning,

Wildfire smoke from Canada and the western United States spread across North America this week, covering the skies in a thick haze, giving the sun a brutal red hue and triggering health alerts from Toronto to Philadelphia. was. The air quality remained in the unhealthy category over most parts of the east coast on Wednesday morning.

The map below shows how the smoke spread across the country, based on modeling by the National Oceanic and Atmospheric Administration. It refers to fine particulate pollution from forest fires and does not include pollution from other human sources such as power plants and cars.

Roisin Komen, an atmospheric scientist at Columbia University, said it is not unprecedented to see smoke travel such long distances, but it does not always descend to the surface.

The air quality index, a measure developed by the Environmental Protection Agency, spread across the Midwest and East Coast this week, with numbers hovering around 130 to 160 in New York City, a range where members of vulnerable groups and the general public can feel adverse. can. health effects. (The index runs from 0 to 500; the higher the number, the higher the level of air pollution, with readings over 100 considered particularly unhealthy.)

In other East Coast cities, readings also remained elevated early Wednesday: 126 in Baltimore, 121 in Narragansett, RI, and 129 in Pennsylvania’s Lehigh Valley.

the terrible red sun rises was recorded throughout the region. Pollution was forecast to increase in the New York area on Wednesday morning, but then smoke was expected to reach Washington, DC and Virginia from the south.

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There are currently more than 80 major fires burning in 13 US states, and many more are active across Canada.

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