Riverside, CA – The National Weather Service (NWS) has extended Heat Advisories across the Inland Empire and Orange County’s inland valleys through 7 p.m. PDT on Wednesday, October 29, warning residents of unseasonably high temperatures expected to linger through midweek.
The Weather Alert: Heat Advisories Remain in Effect
According to the NWS San Diego and Los Angeles/Oxnard offices, residents in inland valleys, foothill regions, and the lower mountain slopes will experience temperatures between 90°F and 96°F, with Ojai Valley and Lake Casitas also expected to see highs in the mid-90s.
Meteorologists attribute the warm spell to persistent Santa Ana winds and dry offshore flow, creating a combination of low humidity and elevated fire danger across parts of Southern California.
“This pattern of hot and dry weather is typical for October in Southern California, but the duration of this event makes it a serious concern for heat-related illness,” forecasters said in Wednesday’s briefing.
Health and Safety Risks: Officials Urge Caution
Officials warn that the unseasonably warm temperatures could lead to heat exhaustion or heat stroke, especially for seniors, young children, outdoor workers, and individuals without air conditioning.
Residents are urged to take the following precautions during the advisory period:
- Stay hydrated by drinking plenty of water throughout the day.
- Avoid strenuous outdoor activities, especially during peak afternoon heat.
- Check on elderly relatives and neighbors who may be vulnerable to heat illness.
- Never leave children or pets inside parked vehicles, even for short periods.
Local emergency officials also encouraged residents to seek air-conditioned public spaces—such as shopping centers, libraries, or designated cooling centers—if home temperatures become unsafe.
Meteorological Factors and Fire Concerns
The current heat wave is being fueled by Santa Ana winds—a weather phenomenon that occurs when high-pressure air from the Great Basin flows toward the coast, bringing hot and dry conditions.
The warm, gusty winds are also drying out vegetation, prompting renewed concern for wildfire danger in mountain foothills and canyon regions. Fire departments across Riverside, Orange, and San Diego counties remain on high alert, urging residents to avoid outdoor burning and report any signs of smoke or fire immediately.
Forecasters say wind speeds could reach 20 to 30 mph, with stronger gusts in exposed areas.
Forecast Outlook: Gradual Cooling Expected
The NWS expects temperatures to ease slightly beginning Thursday as onshore flow increases, bringing cooler marine air inland. However, inland valleys will likely remain above seasonal averages through the weekend, with highs in the upper 80s to low 90s.
Coastal areas are forecast to experience milder conditions, with highs in the mid-70s by Friday, while overnight lows across the region should dip into the 60s, providing some relief from daytime heat.
Meteorologists say another round of Santa Ana winds could return early next week, though current models show a less intense event compared to this week’s system.
Community Preparedness and Resources
City and county officials in the Inland Empire and Orange County have opened temporary cooling centers to help residents manage the heat. Information about locations and operating hours is available through local government websites and emergency alert systems.
Health departments continue to stress that heat waves can be life-threatening, particularly for those with chronic illnesses or limited mobility. Residents are encouraged to stay informed through NWS alerts and local news updates as conditions evolve.
Conclusion
With temperatures nearing 96°F in some inland areas, Southern Californians are being reminded to stay vigilant against heat-related risks until the advisory expires on Wednesday evening. Slight cooling is expected later in the week, but inland regions will continue to see above-average warmth into the weekend.
How are you coping with the heat wave in your area? Share your experiences and safety tips in the comments below.
