Orange County, San Bernardino and Riverside County Valleys and San Diego County Inland Valleys are under a heat advisory which was issued by the National Weather Service on Sunday at 12:32 p.m. The advisory is valid for Tuesday, Oct. 28 between 11 a.m. and 7 p.m.
The NWS San Diego CA said, “Temperatures of 88 to 95 degrees and moderate HeatRisk expected.”
“Hot temperatures may cause heat illnesses,” the NWS said.
Staying safe in high temperatures
Safety tips from the Environmental Health and Safety office at UC Irvine:
Drink water: Drinking plenty of water frequently is vital for those exposed to heat. An individual may produce as much as 2 to 3 gallons of sweat per day. To replenish that fluid you should drink 3 to 4 cups of water every hour.
Take breaks: Taking breaks in a cool shaded area and allowing time for recovery from the heat during the day are effective ways to avoid heat-related illness.
Avoid some beverages: Avoid or limit the use of alcohol and caffeine during periods of extreme heat. Both dehydrate the body.
Stop and rest: If you start to feel symptoms such as nausea, dizziness, weakness or unusual fatigue, rest in a cool shaded area. If symptoms persist or worsen seek immediate medical attention.
Clothing: Whenever possible, wear clothing that provides protection from the sun but allows airflow to the body. Protect your head and shade your eyes when outdoors.
Be prepared: When in the heat be sure to pay extra attention to those you’re with and be sure you know how to call for medical attention.
For information about cooling centers operated by Los Angeles, Orange, Riverside and San Bernardino counties, see https://ready.lacounty.gov/heat/, https://ocgov.com/cooling-centers, https://capriverside.org/cool-centers and DPH.
Originally Published: October 26, 2025 at 12:34 PM PDT