Smoke from large wildfires burning across Canada has severely affected air quality in several parts of the United States, prompting health advisories and forcing millions of residents to stay indoors as pollution levels reached unhealthy and hazardous categories.
According to the Associated Press, smoke has spread across the Great Lakes region, Midwest and parts of the East Coast after a persistent high-pressure system trapped polluted air close to the ground. Cities including Detroit, Chicago, New York and Philadelphia witnessed reduced visibility and deteriorating air quality, with officials advising residents to avoid unnecessary outdoor exposure.
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Why has air quality deteriorated so rapidly?
Meteorologists said the smoke is primarily originating from ongoing wildfires in Canada, along with fires in northern Minnesota. The stagnant weather pattern has prevented the smoke from dispersing, allowing pollution to accumulate near the surface.
Steven Freitag, a meteorologist with the National Weather Service in Detroit, said visibility dropped to nearly half a mile in some areas as dense smoke engulfed the region.
Air quality alerts were issued across Michigan and much of Minnesota, while conditions in parts of Illinois, including Chicago, ranged from “very unhealthy” to “hazardous.”
Who faces the biggest health risk?
Health experts warn that microscopic particles present in wildfire smoke can penetrate deep into the lungs and enter the bloodstream, increasing the risk of respiratory illness, heart disease, stroke and other long-term health complications.
According to a recent study cited by the Associated Press, prolonged exposure to wildfire smoke contributes to an estimated 24,100 deaths annually across the contiguous United States.
Authorities in New York opened cooling centres, shifted public activities indoors and distributed thousands of N95 and KN95 masks at transit hubs.
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Philadelphia’s public health department also advised residents to avoid strenuous outdoor activities, while Minnesota officials warned that smoke conditions could continue for weeks or even months depending on wind patterns and wildfire activity.
Officials said firefighters continue battling multiple wildfires, but smoke is expected to remain a recurring challenge until cooler weather and snowfall help extinguish the blazes later this year.
FAQs
Q1. Why is wildfire smoke affecting air quality across the US?
Smoke from large wildfires burning in Canada and northern Minnesota has been carried into several US states, where stagnant weather conditions have trapped polluted air near the ground.
Q2. How can people protect themselves from wildfire smoke?
Health officials recommend staying indoors, using air purifiers if available, avoiding strenuous outdoor activity, and wearing N95 or KN95 masks when venturing outside.
