COC005-035-123-069-059-031-014-013-001-192200-
Arapahoe-Douglas-Weld-Larimer-Jefferson-Denver-Broomfield-
Boulder-Adams-
1010 PM MDT Thu Jun 18 2026

...OZONE ACTION DAY ALERT FROM 400 PM THURSDAY UNTIL 400 PM
FRIDAY...

The Colorado Department of Public Health and Environment has
issued the following...

WHAT...Ozone Action Day Alert.

WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties

WHEN...400 PM Thursday June 18 to 400 PM Friday June 19

IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor.  However, hot and stagnant weather will
allow ozone to reach the Unhealthy for Sensitive Groups category
on Thursday and Friday.  For Colorado air quality conditions,
forecasts, and advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx   If
possible, please help us reduce ozone pollution by limiting
driving gas and diesel-powered vehicles until at least 4 p.m.
Friday, June 19, 2026. Colorado is also addressing ozone pollution
through state policies. For more information about health impacts
and how ozone pollution forms in Colorado, visit:
https://cdphe.colorado.gov/ozone- pollution-and-your-health

HEALTH INFORMATION...Increasing likelihood of respiratory symptoms
and breathing discomfort in active children and adults and people
with lung disease, such as asthma. Active children and adults, and
people with lung disease, such as asthma, should reduce prolonged
or heavy outdoor exertion.

$$

CAZ061-192145-
Coachella Valley-
Including the cities of Indio, Palm Springs, Cathedral City,
Palm Desert, Palm Desert Country, La Quinta, and Coachella
240 PM PDT Thu Jun 18 2026

...AIR QUALITY ALERT DUE TO HARMFUL PARTICLE POLLUTION LEVELS FROM
WINDBLOWN DUST...

* WHAT...The South Coast AQMD has issued an air quality alert due to
harmful levels of particle pollution from windblown dust. Visit
https://www.aqmd.gov/alertinfo to check current and forecasted air
quality levels.

* WHERE...in the Coachella Valley. Levels of particle pollution can
vary by time and location depending on emissions and local weather
conditions.

* WHEN...until 11 AM Saturday.

* IMPACTS... Particle pollution can get deep into the lungs and
cause serious health problems such as asthma attacks, heart and lung
disease symptoms, and increased risk of lung infections. Everyone
can be affected, but sensitive groups such as 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To protect your health, check air quality levels and act as needed:

    * When Air Quality Index (AQI) levels are "Unhealthy for
      Sensitive Groups" (orange), sensitive groups as specified
      above should limit extended or intense outdoor activity.
    * When AQI is "Unhealthy" (red), everyone may experience health
      impacts. Sensitive groups should avoid extended time outdoors.
    * When AQI is "Very Unhealthy" (purple), sensitive groups should
      avoid all outdoor physical activity. Everyone else should
      avoid extended or intense outdoor activity.
    * When AQI is "Hazardous" (maroon), everyone should avoid all
      outdoor physical activity.

* ADDITIONAL DETAILS...

To help keep indoor air clean when air quality is poor:

    * Keep windows and doors closed
    * Run your air conditioner and/or an air purifier
    * 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

To help minimize outdoor particle pollution levels:

    * Carpool, telecommute, reduce trips, or take public
      transportation
    * Slow down if driving on dirt roads
    * Stabilize loose soils

$$

CAZ368-191930-
Los Angeles County Inland Coast including Downtown Los Angeles-
Including the cities of Beverly Hills, Compton, Culver City, Downey,
Hollywood, and Norwalk
1210 PM PDT Thu Jun 18 2026

...AIR QUALITY ALERT DUE TO HARMFUL FINE PARTICLE POLLUTION LEVELS...

* WHAT...The South Coast AQMD has issued an air quality alert due to
harmful levels of fine particle pollution.
Visit https://www.aqmd.gov/alertinfo to check current and forecasted
air quality levels.

* WHERE...Boyle Heights and East Los Angeles. Levels of particle
pollution can vary by time and location depending on emissions and
local weather conditions.

* WHEN...until 12:30 PM Friday.

* IMPACTS...Particle pollution can get deep into the lungs and cause
serious health problems such as heart attacks, bronchitis, asthma
attacks, and difficulty breathing. Everyone can be affected, but
sensitive groups such as 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To protect your health, check air quality levels and act as needed:

    * When Air Quality Index (AQI) levels are "Unhealthy for
      Sensitive Groups" (orange), sensitive groups as specified
      above should limit extended or intense outdoor activity.
    * When AQI is "Unhealthy" (red), everyone may experience health
      impacts. Sensitive groups should avoid extended time outdoors.
    * When AQI is "Very Unhealthy" (purple), sensitive groups should
      avoid all outdoor physical activity. Everyone else should
      avoid extended or intense outdoor activity.
    * When AQI is "Hazardous" (maroon), everyone should avoid all
      outdoor physical activity.

* ADDITIONAL DETAILS...

To help keep indoor air clean when air quality is poor:

    * Keep windows and doors closed
    * Run your air conditioner and/or an air purifier
    * 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

$$