Southern California: Heat Advisories in Effect

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21 May 2025 11:45 PM

CALIFORNIA - The National Weather Service has issued a Heat Advisory through Thursday evening for southern California, including Santa Barbara, Ventura, and Los Angeles counties. Temperatures in these regions are expected to reach up to 100°F, with some locations potentially breaking record highs.

Areas that are expected to experience the most intense heat are the San Fernando, San Gabriel, and Santa Clarita valleys, where high temperatures may climb to 90 to 100°F over the next couple of afternoons. Even areas along the coast may see unusually high temperatures.

Here's a look at our forecasted temperatures for the Thursday to Saturday timeframe in southern California, the Mohave Desert, and into Arizona.

In addition to the heat, there is an increased fire risk. The combination of hot temperatures, lower humidity, and higher winds has led to fire weather alerts for Thursday in the San Joaquin Valley.

This heat wave is expected to persist through Thursday, with some relief this weekend as temperatures are expected to moderate. For the latest updates on weather conditions and advisories, be sure to join us on WeatherNation.

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