Forecasted Air Quality Impacts

A multi-day extreme ozone (smog) event is expected due to the heat wave affecting the region.
The National Weather Service has issued Heat Advisories and Extreme Heat Warnings. Visit https://www.weather.gov/sgx/ and https://www.weather.gov/lox/ for more information.
Air Quality Index (AQI) will likely reach Unhealthy for Sensitive Groups or higher levels in inland parts of the South Coast Air Basin — including Lake Elsinore, Corona, Hemet, and Pasadena — as well as in the Coachella Valley.
AQI will likely reach Unhealthy or higher in the Santa Clarita Valley, portions of the San Gabriel Valley, the San Bernardino Valley, and portions of the San Bernardino Mountains from Tuesday through Thursday.
Ozone levels are expected to be lower in coastal areas.
South Coast AQMD will issue an update if ozone levels are predicted to remain high after Thursday.