Hazard Report Provided By forecast.weather.gov

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
901 PM PDT Tue Aug 5 2025

CAZ055-061315-
/O.CON.KSGX.HT.Y.0004.250806T1700Z-250809T0300Z/
San Bernardino County Mountains-
Including the cities of Wrightwood, Lake Arrowhead, Running
Springs, Big Bear Lake, and Crestline
901 PM PDT Tue Aug 5 2025

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM PDT
FRIDAY...

* WHAT...Temperatures up to 95 for elevations below 5500 feet
  expected.

* WHERE...San Bernardino County Mountains.

* WHEN...From 10 AM Wednesday to 8 PM PDT Friday.

* IMPACTS...Hot temperatures may cause heat illnesses.

* ADDITIONAL DETAILS...Thursday will be the hottest day of the week.

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. Limit or postpone
outdoor recreation.

&&

$$

CAZ048-055-056-061-065-070700-
San Bernardino and Riverside County Valleys-The Inland Empire-
San Bernardino County Mountains-Riverside County Mountains-
Coachella Valley-San Gorgonio Pass near Banning-
Including the cities of Riverside, San Bernardino, Ontario,
Moreno Valley, Fontana, Rancho Cucamonga, Corona, Crestline,
Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs,
Wrightwood, Idyllwild-Pine Cove, Indio, Palm Springs,
Cathedral City, Palm Desert, Palm Desert Country, La Quinta,
and Coachella
308 PM PDT Tue Aug 5 2025

...AIR QUALITY ALERT FOR HARMFUL FINE PARTICLE POLLUTION LEVELS DUE
TO WILDFIRE SMOKE...

* WHAT...The South Coast AQMD has extended an air quality alert due
  to increased fine particle pollution from wildfire smoke.

* WHERE...San Bernardino Mountains, Angeles National Forest, San Jacinto
  Mountains, Coachella Valley, the Santa Rosa Reservation, and parts
  of the Inland Empire. Levels of particle pollution can vary by
  time and location depending on fire activity and local weather
  conditions.

* WHEN...Through Wednesday 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

* ADDITIONAL DETAILS...

To view current and forecasted air quality levels, visit the South
Coast Air Quality Management District website at aqmd.gov or
download the mobile app at www.aqmd.gov/mobileapp. Additional
details for this air quality alert may be available at
www.aqmd.gov/advisory.

To view current and forecasted air quality levels, visit the Mojave
Desert Air Quality Management District website at mdaqmd.ca.gov.
Additional details for this air quality alert may be available at
www.mdaqmd.ca.gov/advisories.

To view current and forecasted air quality levels, visit the
antelope Valley Air Quality Management District website at
www.avaqmd.ca.gov.

$$

Hazard Report Provided By forecast.weather.gov