Overview
- The National Weather Service issued alerts Thursday, with advisories in effect until midnight Saturday, Nov. 29.
- Affected areas include the San Gabriel Valley, Orange County and its coast, the San Bernardino and Riverside County valleys, the Riverside County mountains, and the San Gorgonio Pass near Banning.
- South Coast AQMD enacted a mandatory No-Burn rule for the South Coast Air Basin, prohibiting wood, pellet, and manufactured fire logs in any indoor or outdoor wood-burning device.
- Authorities say fine particles in smoke can penetrate deep into lungs, triggering asthma attacks and increasing emergency room visits, with heightened risk for children, seniors, and people with respiratory or cardiac conditions.
- Residents are urged to stay indoors when possible, limit outdoor activity, run air conditioning or HEPA air purifiers, avoid devices that pull in outdoor air, refrain from open burning, and monitor NOAA/NWS updates, noting No-Burn Days are based on 24-hour PM2.5 forecasts that may not match real-time maps.