Extreme Heat Warning
NWS San Diego CA
Archived copy, taken Wed, Sep 9, 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... ...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 PM PDT THURSDAY
Extreme Heat Warning issued September 9 at 2:58AM PDT until September 9 at 8:00PM PDT by NWS San Diego CA
- Issued
- Wed, Sep 9, 2026, 2:58 AM PDT
- Effective
- Wed, Sep 9, 2026, 2:58 AM PDT
- Ends
- Wed, Sep 9, 2026, 8:00 PM PDT
- Severity
- Severe
- Urgency
- Expected
- Certainty
- Likely
- Status
- Actual
- Message type
- Alert
AreaSan Bernardino and Riverside County Valleys-The Inland Empire
- WHAT...For the Extreme Heat Warning, dangerously hot conditions with high temperatures of 104 to 110 with low temperatures in the 70s and lower 80s expected. For the Heat Advisory, high temperatures in the upper 90s to 105 expected.
- WHERE...San Bernardino and Riverside County Valleys-The Inland Empire.
- WHEN...For the Extreme Heat Warning, until 8 PM PDT this evening. For the Heat Advisory, from 8 PM this evening to 8 PM PDT Thursday.
- IMPACTS...Heat related illnesses increase significantly during extreme heat events.
- ADDITIONAL DETAILS...Major HeatRisk through today. Warm overnight temperatures will limit relief from the heat.
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.
Heat Advisory
NWS San Diego CA
Archived copy, taken Wed, Sep 9, 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... ...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 PM PDT THURSDAY
Heat Advisory issued September 9 at 2:58AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA
- Issued
- Wed, Sep 9, 2026, 2:58 AM PDT
- Effective
- Wed, Sep 9, 2026, 2:58 AM PDT
- Ends
- Thu, Sep 10, 2026, 8:00 PM PDT
- Severity
- Moderate
- Urgency
- Expected
- Certainty
- Likely
- Status
- Actual
- Message type
- Alert
AreaSan Bernardino and Riverside County Valleys-The Inland Empire
- WHAT...For the Extreme Heat Warning, dangerously hot conditions with high temperatures of 104 to 110 with low temperatures in the 70s and lower 80s expected. For the Heat Advisory, high temperatures in the upper 90s to 105 expected.
- WHERE...San Bernardino and Riverside County Valleys-The Inland Empire.
- WHEN...For the Extreme Heat Warning, until 8 PM PDT this evening. For the Heat Advisory, from 8 PM this evening to 8 PM PDT Thursday.
- IMPACTS...Heat related illnesses increase significantly during extreme heat events.
- ADDITIONAL DETAILS...Major HeatRisk through today. Warm overnight temperatures will limit relief from the heat.
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.