The National Weather Service has issued a heat advisory for portions of Southern California, covering areas such as Orange County, the Inland Empire and the mountains of San Bernardino and Riverside counties. The advisory takes effect immediately and remains in force through Monday, August 24, 2026, as temperatures climb into the triple‑digit range.
Temperatures across the region have risen above 100 degrees Fahrenheit, prompting the warning. The advisory cites a combination of high daytime heat and unusually warm nighttime temperatures as the primary factors behind the heightened risk. Residents in the affected zones are advised to take precautions against heat‑related illness and to stay hydrated.
The advisory comes amid a broader heat wave sweeping Southern California. Inland areas are already seeing temperatures exceed the 100‑degree mark, and meteorologists project that conditions could become even hotter later in the week. The National Weather Service’s warning reflects the expectation that the heat will persist, with forecasts indicating a continued rise in temperature across the region.
Authorities have highlighted that the advisory applies to both urban and mountainous locations within the specified counties. While the warning does not impose legal restrictions, it serves as an alert for the public to modify outdoor activities and to seek cooler environments when possible. The advisory underscores the challenges posed by the current heat pattern and the need for ongoing vigilance as the high‑temperature event progresses.
As the heat wave continues, the National Weather Service will monitor temperature trends and may extend or adjust the advisory based on evolving conditions. Residents are encouraged to stay informed through official channels and to follow recommended safety measures throughout the advisory period.