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Updated:August 31, 2025 4:30 pm PDT

Heat Advisory HEAT ADVISORY  
Riverside County

  Effective: Sun, 8/31 12:46pm Severity:  Moderate 
  Updated: August 31, 2025 4:30 pm Urgency: Expected
  Expires: Mon, 9/1 7:00am Certainty: Likely

Areas Affected: San Bernardino and Riverside County Valleys-The Inland Empire - San Diego County Inland Valleys - Santa Ana Mountains and Foothills - Orange County Inland
 
Alert Details:
* WHAT...Temperatures 93 to 100 expected for the valleys and
mountains. Temperatures up to 106 expected for the Inland Empire.

* WHERE...Orange County Inland Areas, San Bernardino and Riverside
County Valleys-The Inland Empire, San Diego County Valleys, and
Santa Ana Mountains and Foothills.

* WHEN...From 10 AM Monday to 6 PM PDT Tuesday.

* IMPACTS...Hot temperatures may cause heat illnesses.

Information:
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.