Extreme Heat Warning — Update
NWS San Diego CA
Archived copy, taken Fri, Aug 28, 2026, 6:00 AM PDT. Read this alert at the National Weather Service →
EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
Extreme Heat Warning issued August 28 at 5:03AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA
- Issued
- Fri, Aug 28, 2026, 5:03 AM PDT
- Effective
- Fri, Aug 28, 2026, 5:03 AM PDT
- Ends
- Fri, Aug 28, 2026, 8:00 PM PDT
- Severity
- Severe
- Urgency
- Expected
- Certainty
- Likely
- Status
- Actual
- Message type
- Update
AreaSan Bernardino and Riverside County Valleys-The Inland Empire
- WHAT...Dangerously hot conditions with temperatures of 103 to 107.
- WHERE...San Bernardino and Riverside County Valleys-The Inland Empire.
- WHEN...Until 8 PM PDT this evening.
- IMPACTS...Heat related illnesses increase significantly during extreme heat events.
- ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal will limit overnight relief from the heat and will increase the threat of heat-related illness across populations.
What the Weather Service says to do
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Air Quality Alert
NWS San Diego CA
Archived copy, taken Fri, Aug 28, 2026, 6:00 AM PDT. Read this alert at the National Weather Service →
AIR QUALITY ALERT FOR HARMFUL LEVELS OF OZONE (SMOG) AIR POLLUTION
Air Quality Alert issued August 24 at 1:34PM PDT by NWS San Diego CA
- Issued
- Mon, Aug 24, 2026, 1:34 PM PDT
- Effective
- Mon, Aug 24, 2026, 1:34 PM PDT
- Ends
- Fri, Aug 28, 2026, 8:00 PM PDT
- Severity
- Unknown
- Urgency
- Unknown
- Certainty
- Unknown
- Status
- Actual
- Message type
- Alert
AreaSan Bernardino and Riverside County Valleys-The Inland Empire; San Bernardino County Mountains; Coachella Valley; San Gorgonio Pass Near Banning; Orange County Inland
- WHAT...The South Coast AQMD has issued an air quality alert due to harmful levels of ozone pollution. Visit https://www.aqmd.gov/alertinfo to check current and forecasted air quality levels.
- WHERE...in the the South Coast Air Basin and Coachella Valley. Levels of ozone pollution can vary by time and location depending on emissions and air pollution transport.
- WHEN...from 1 PM Monday to 8 PM Friday. The highest ozone levels typically occur in the afternoon and early-evening hours.
- IMPACTS... Ozone air pollution can cause serious health problems, including trouble breathing, asthma attacks, and lung damage. Everyone can be affected, but sensitive groups such as people with lung disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.
What the Weather Service says to do
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, and grilling
To help minimize outdoor ozone air pollution levels:
- Limit the use of gasoline powered lawn and garden equipment until evening hours * Try to delay trips to the gas station and the use of household chemicals until the evening
For the latest air quality forecasts and information, visit the website at aqmd.gov.