Extreme Heat Warning — Update
NWS San Diego CA
Archived copy, taken Tue, Sep 8, 2026, 6:00 AM PDT. Read this alert at the National Weather Service →
EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY... ...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT THURSDAY
Extreme Heat Warning issued September 8 at 3:44AM PDT until September 9 at 8:00PM PDT by NWS San Diego CA
- Issued
- Tue, Sep 8, 2026, 3:44 AM PDT
- Effective
- Tue, Sep 8, 2026, 3:44 AM PDT
- Ends
- Wed, Sep 9, 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...For the Extreme Heat Warning, dangerously hot conditions with temperatures high temperatures in the upper 90s to 108 with low temperatures in the 70s expected. For the Heat Advisory, high temperatures in the mid 90s to 102 expected.
- WHERE...San Bernardino and Riverside County Valleys-The Inland Empire.
- WHEN...For the Extreme Heat Warning, until 8 PM PDT Wednesday. For the Heat Advisory, from 8 PM Wednesday to 8 PM PDT Thursday.
- IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses.
- ADDITIONAL DETAILS...Major HeatRisk through Wednesday. Warm overnight temperatures will limit overnight 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 — Update
NWS San Diego CA
Archived copy, taken Tue, Sep 8, 2026, 6:00 AM PDT. Read this alert at the National Weather Service →
EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY... ...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT THURSDAY
Heat Advisory issued September 8 at 3:44AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA
- Issued
- Tue, Sep 8, 2026, 3:44 AM PDT
- Effective
- Tue, Sep 8, 2026, 3:44 AM PDT
- Ends
- Thu, Sep 10, 2026, 8:00 PM PDT
- Severity
- Moderate
- Urgency
- Expected
- Certainty
- Likely
- Status
- Actual
- Message type
- Update
AreaSan Bernardino and Riverside County Valleys-The Inland Empire
- WHAT...For the Extreme Heat Warning, dangerously hot conditions with temperatures high temperatures in the upper 90s to 108 with low temperatures in the 70s expected. For the Heat Advisory, high temperatures in the mid 90s to 102 expected.
- WHERE...San Bernardino and Riverside County Valleys-The Inland Empire.
- WHEN...For the Extreme Heat Warning, until 8 PM PDT Wednesday. For the Heat Advisory, from 8 PM Wednesday to 8 PM PDT Thursday.
- IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses.
- ADDITIONAL DETAILS...Major HeatRisk through Wednesday. Warm overnight temperatures will limit overnight 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.