Summary
Residents in parts of California and Oregon have been advised to stay indoors due to high levels of air pollution. The Environmental Protection Agency (EPA) reported that fine particle pollution levels have reached "unhealthy" levels, prompting warnings for people to limit outdoor activities.
Key Facts
- The affected areas include Portola in California and John Day in Oregon.
- The pollution involves fine particles called PM2.5, which are harmful when inhaled.
- The EPA uses an Air Quality Index (AQI) to determine the safety of the air.
- When the AQI indicates "unhealthy" levels, people, especially sensitive groups, are urged to avoid strenuous outdoor activities.
- Sensitive groups include the elderly, children, and people with heart or lung conditions.
- The general population is also advised to limit intense outdoor activities during this time.
- The information is based on data available as of January 18, early in the morning.
