Los Angeles, CA – Temperatures approaching 100 degrees could rapidly heat up the Los Angeles Basin and nearby valleys by Thursday morning, raising health risks for millions across Ventura and Los Angeles counties through Friday evening.
According to the National Weather Service in Los Angeles/Oxnard, a Heat Advisory takes effect at 10 a.m. Thursday and continues until 8 p.m. Friday as widespread highs climb between 90 and 100 degrees across coastal valleys, inland metro areas, and portions of the coast.
The hottest readings are expected in the San Fernando Valley, Santa Clarita Valley, and southeastern Ventura County valleys, including Woodland Hills, Van Nuys, Chatsworth, Simi Valley, and Thousand Oaks, where temperatures could approach the upper 90s to near 100 degrees during peak afternoon hours. Urban areas such as Downtown Los Angeles, Burbank, Pasadena, Glendale, and Pomona will also feel significant heat buildup.
Even coastal communities including Santa Monica, Malibu, Long Beach, and Redondo Beach may see highs push into the upper 80s and low 90s, well above typical early March levels. The warmth could affect commuters near LAX, the I-405 corridor, and the 101 through the San Fernando Valley during the afternoon and early evening.
Health officials urge residents to limit strenuous activity during the hottest part of the day, drink water frequently, and check on older adults or neighbors without air conditioning. Lightweight clothing and shaded breaks are recommended for outdoor workers.
Forecasters say the unusual heat could persist into early next week, and additional advisories or even Extreme Heat Warnings may be issued if temperatures continue to climb across Southern California.
