Extreme Heat Warning for San Bernardino and Riverside County Valleys
If you are in immediate danger, call emergency services now.
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Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
An Extreme Heat Warning is in effect until 8 PM PDT today for the Inland Empire with highs of 104 to 110 degrees.
Read this weather record in 30 seconds
- Record type
- Extreme Heat Warning
- Affected area
- Inland Empire, California
- Issued
- September 9, 2026
- Issuing authority
- NWS San Diego CA
Heat notices are time-bound and location-specific. Confirm the current forecast and local public-health guidance before relying on this archived record.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
Extreme Heat Warning issued by NWS San Diego CA. Effective from 2026-09-09T02:58:00-07:00 until 2026-09-09T20:00:00-07:00. Severity: Severe. Certainty: Likely. Urgency: Expected.
Affected Areas
San Bernardino and Riverside County Valleys-The Inland Empire (CAZ048).
What You Should 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.
Expected Conditions
Dangerously hot conditions with high temperatures of 104 to 110 and low temperatures in the 70s and lower 80s. Major HeatRisk through today. Warm overnight temperatures will limit relief from the heat. Heat related illnesses increase significantly during extreme heat events.
Timeline
Warning remains in effect until 8 PM PDT this evening. A Heat Advisory follows from 8 PM this evening to 8 PM PDT Thursday.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (926 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to September 9, 2026.
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