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Updated:May 19, 2026 9:30 am PDT

Air Quality Alert AIR QUALITY ALERT  
Riverside County

  Effective: Mon, 5/18 7:40pm Severity: Unknown
  Updated: May 19, 2026 9:30 am Urgency: Unknown
  Expires: Tue, 5/19 7:45pm Certainty: Unknown

Areas Affected: Santa Ana Mountains and Foothills - Orange County Coastal - Orange County Inland
 
Alert Details:
* WHAT...The South Coast AQMD has issued an air quality alert due to
increased fine particle pollution from wildfire smoke. Visit
https://www.aqmd.gov/alertinfo to check current and forecasted air
quality levels.

* WHERE...most of LA County and all of Orange County. Levels of
particle pollution can vary by time and location depending on fire
activity and local weather conditions.

* WHEN...until Tuesday evening.

* IMPACTS...Particles in wildfire smoke can get deep into the lungs
and cause serious health problems such as heart attacks, strokes,
asthma attacks, and difficulty breathing. Everyone can be affected,
but people with lung or heart disease, older adults, people who are
pregnant, children, and those who spend a lot of time outdoors are
at greater risk.

Information:
To protect your health, if you smell or see smoke:

* Remain indoors with windows and doors closed
* Avoid intense outdoor physical activity
* Run your air conditioner and/or an air purifier
* If you must be outdoors, keep the time brief and wear a well-
fitting N-95 mask
* Do not use whole house fans or swamp coolers that bring in outside
air if you have other methods to stay cool
* Avoid other sources of pollution such as fireplaces, candles,
incense, grilling, and gasoline-powered lawn and garden
equipment