Dec 22, 2025 06:18 PM
https://www.dailymail.co.uk/sciencetech/...s-air.html
ALERT: Millions of Americans are under a sudden and dangerous air-quality emergency, with authorities across the West urging residents to stay indoors.
In Southern California, more than 10 million people face hazardous conditions as the South Coast Air Quality Management District (South Coast AQMD) reports sharply elevated levels of PM2.5, microscopic particles produced by vehicles, industry and wood burning.
Cities affected include Los Angeles, Santa Monica, Torrance, Long Beach, Pasadena, Anaheim, Irvine, Santa Ana, Huntington Beach, Riverside, San Bernardino, Corona, Moreno Valley, Fontana, Rancho Cucamonga and Mission Viejo.
'They can also increase the risk of heart attacks, strokes, and other cardiovascular problems, especially in people with pre-existing heart disease, the elderly, and those with chronic conditions. Residents are urged to remain indoors with windows and doors closed and to avoid extended or intense outdoor activity.
Meanwhile, in northeastern Wyoming, communities in the Powder River Basin are under a blowing dust health alert through 3pm local time. Strong west-southwest winds of 30 to 40 mph, with gusts up to 45 mph, are creating hazardous air conditions in Gillette, Recluse, Weston, Rozet, Wright, and surrounding areas.
The Wyoming Department of Environmental Quality’s Air Quality Division urged residents to avoid excessive physical exertion outdoors and to limit prolonged exposure to the dusty air. While vulnerable populations are most at risk, officials emphasized that everyone in the affected area should take precautions until conditions improve.
Meanwhile, Southern California is grappling with a separate but equally serious air quality crisis. The South Coast AQMD has extended a mandatory wood-burning ban across the South Coast Air Basin, citing elevated levels of fine particle pollution.
Under the No-Burn rule, residents are prohibited from burning wood, pellets, or manufactured fire logs in any indoor or outdoor wood-burning device. Officials said smoke from fireplaces and fire pits significantly worsens pollution during stagnant air conditions. Some exemptions apply, including homes that rely on wood as a sole source of heat, low-income households, and areas above 3,000 feet in elevation.
Health officials warned that PM2.5 particles are small enough to penetrate deep into the lungs and even enter the bloodstream, increasing the risk of serious health problems. Officials also advise against using devices that pull outdoor air inside, such as swamp coolers or whole-house fans, unless no other cooling options are available.
Air quality alerts are issued when pollution levels are forecast to remain high for a full 24-hour period, even if real-time air quality maps do not immediately reflect the severity. South Coast AQMD emphasized that these preventative measures are critical to reducing health risks during high-pollution episodes.
With dust storms choking the air in Wyoming and pollution building across Southern California, authorities are urging residents to take warnings seriously and limit exposure until conditions improve. Officials continue to monitor air quality closely and say additional advisories may be issued if hazardous conditions persist.
ALERT: Millions of Americans are under a sudden and dangerous air-quality emergency, with authorities across the West urging residents to stay indoors.
In Southern California, more than 10 million people face hazardous conditions as the South Coast Air Quality Management District (South Coast AQMD) reports sharply elevated levels of PM2.5, microscopic particles produced by vehicles, industry and wood burning.
Cities affected include Los Angeles, Santa Monica, Torrance, Long Beach, Pasadena, Anaheim, Irvine, Santa Ana, Huntington Beach, Riverside, San Bernardino, Corona, Moreno Valley, Fontana, Rancho Cucamonga and Mission Viejo.
'They can also increase the risk of heart attacks, strokes, and other cardiovascular problems, especially in people with pre-existing heart disease, the elderly, and those with chronic conditions. Residents are urged to remain indoors with windows and doors closed and to avoid extended or intense outdoor activity.
Meanwhile, in northeastern Wyoming, communities in the Powder River Basin are under a blowing dust health alert through 3pm local time. Strong west-southwest winds of 30 to 40 mph, with gusts up to 45 mph, are creating hazardous air conditions in Gillette, Recluse, Weston, Rozet, Wright, and surrounding areas.
The Wyoming Department of Environmental Quality’s Air Quality Division urged residents to avoid excessive physical exertion outdoors and to limit prolonged exposure to the dusty air. While vulnerable populations are most at risk, officials emphasized that everyone in the affected area should take precautions until conditions improve.
Meanwhile, Southern California is grappling with a separate but equally serious air quality crisis. The South Coast AQMD has extended a mandatory wood-burning ban across the South Coast Air Basin, citing elevated levels of fine particle pollution.
Under the No-Burn rule, residents are prohibited from burning wood, pellets, or manufactured fire logs in any indoor or outdoor wood-burning device. Officials said smoke from fireplaces and fire pits significantly worsens pollution during stagnant air conditions. Some exemptions apply, including homes that rely on wood as a sole source of heat, low-income households, and areas above 3,000 feet in elevation.
Health officials warned that PM2.5 particles are small enough to penetrate deep into the lungs and even enter the bloodstream, increasing the risk of serious health problems. Officials also advise against using devices that pull outdoor air inside, such as swamp coolers or whole-house fans, unless no other cooling options are available.
Air quality alerts are issued when pollution levels are forecast to remain high for a full 24-hour period, even if real-time air quality maps do not immediately reflect the severity. South Coast AQMD emphasized that these preventative measures are critical to reducing health risks during high-pollution episodes.
With dust storms choking the air in Wyoming and pollution building across Southern California, authorities are urging residents to take warnings seriously and limit exposure until conditions improve. Officials continue to monitor air quality closely and say additional advisories may be issued if hazardous conditions persist.