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Updated:March 11, 2026 1:15 am PDT

Heat Advisory HEAT ADVISORY  
San Bernardino County

  Effective: Tue, 3/10 9:27pm Severity:  Moderate 
  Updated: March 11, 2026 1:15 am Urgency: Expected
  Expires: Wed, 3/11 6:15am Certainty: Likely

Areas Affected: San Diego County Coastal Areas - San Bernardino and Riverside County Valleys-The Inland Empire - San Diego County Inland Valleys - Orange County Coastal - Orange County Inland
 
Alert Details:
* WHAT...Temperatures up to 93 to 98 degrees for inland areas.
Temperatures up to 86 to 92 degrees along the coastline.

* WHERE...Orange County Coastal Areas, Orange County Inland Areas,
San Bernardino and Riverside County Valleys-The Inland Empire, San
Diego County Coastal Areas, and San Diego County Valleys.

* WHEN...From 10 AM Thursday to 8 PM PDT Friday.

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

* ADDITIONAL DETAILS...Very warm temperatures are expected to
continue into the weekend and beyond.

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

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.