Pomona, CA Severe Weather Alertstar_ratehome

132 PM PDT Sat Jun 20 2026

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

* WHAT...The South Coast AQMD has extended 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... Central and East Los Angeles, San Gabrieal Valley and
Southeast LA county. Levels of particle pollution can vary by time
and location depending on emissions and local weather conditions.

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

* 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

...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH
THURSDAY EVENING...

* WHAT...Dangerously hot conditions with temperatures up to 100
possible. Hottest Wednesday and Thursday.

* WHERE...San Fernando Valley, San Gabriel Mountains, San Gabriel
Valley, Santa Clarita Valley.

* WHEN...From Tuesday morning through Thursday evening.

* IMPACTS...There is a high risk for dangerous heat illness for
anyone, especially for the very young, the very old, those without
air conditioning, and those active outdoors.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

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