People Urged To Stay Inside Across California, Nevada, Oregon, South Dakota
Summary
People in parts of California, Nevada, Oregon, and South Dakota are advised to stay indoors due to high levels of fine particle pollution, known as PM2.5. The Environmental Protection Agency (EPA) says air pollution reached unhealthy levels, affecting vulnerable groups like the elderly, children, and people with health issues.Key Facts
- Air quality in California, Nevada, Oregon, and South Dakota is considered "unhealthy" due to fine particle pollution as of January 12, 2026.
- Fine particles, or PM2.5, are tiny pollution particles smaller than 2.5 micrometers.
- PM2.5 pollution can cause health problems like asthma or trigger symptoms such as coughing and shortness of breath.
- The EPA advises people, especially sensitive groups, to limit intense or prolonged outdoor activities.
- The Air Quality Index (AQI), used by the EPA, rates air quality on a scale from 0 to 301+.
- Pollution sources include wildfires, vehicles, and industrial emissions.
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