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California Air Alert: Unhealthy Pollution Levels Surge
17 Dec
Summary
- California residents urged to stay indoors due to high air pollution.
- Fine particle pollution in 'unhealthy' AQI category affects Portland.
- Sensitive groups advised to minimize outdoor activity.
- General population should reduce intense outdoor exertion.

Residents in parts of California received urgent advisories on Wednesday morning to remain indoors as air pollution levels surged to "unhealthy" on the Air Quality Index. The pollution, primarily fine particles (PM2.5), has been mapped by AirNow affecting areas around Portland and extending into the Plumas National Forest and Sierra Valley regions.
The Environmental Protection Agency (EPA) recommends specific precautions when air quality reaches this critical level. Individuals particularly vulnerable, such as young children, older adults, and those with pre-existing medical conditions, are strongly advised to limit their time outdoors and reschedule intense activities.
For the broader population, the guidance is to reduce the duration and intensity of outdoor endeavors. Taking more frequent breaks during any necessary outdoor activities is also recommended to mitigate exposure to the elevated pollutant levels.



