Heat Advisory — Update
NWS San Diego CA
Archived copy, taken Tue, Sep 8, 2026, 3:20 AM PDT. Read this alert at the National Weather Service →
EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT WEDNESDAY... ...HEAT ADVISORY NOW IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT THURSDAY
Heat Advisory issued September 8 at 3:10AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA
- Issued
- Tue, Sep 8, 2026, 3:10 AM PDT
- Effective
- Tue, Sep 8, 2026, 3:10 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 up to 100. For the Heat Advisory, temperatures up to 98 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.
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.
If you do not have air conditioning in your home or lack shelter, you can call 211 or visit 211ca.org for assistance locating appropriate shelter from the heat.
Extreme Heat Warning
NWS San Diego CA
Archived copy, taken Tue, Sep 8, 2026, 3:20 AM PDT. Read this alert at the National Weather Service →
EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT WEDNESDAY... ...HEAT ADVISORY NOW IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT THURSDAY
Extreme Heat Warning issued September 8 at 3:10AM PDT until September 9 at 8:00PM PDT by NWS San Diego CA
- Issued
- Tue, Sep 8, 2026, 3:10 AM PDT
- Effective
- Tue, Sep 8, 2026, 3:10 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 temperatures up to 100. For the Heat Advisory, temperatures up to 98 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.
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.
If you do not have air conditioning in your home or lack shelter, you can call 211 or visit 211ca.org for assistance locating appropriate shelter from the heat.