Southern California Heat Wave and Monsoon Threat

The National Weather Service issued an Extreme Heat Warning for the Los Angeles‑Oxnard area from July 13 to July 16, with temperatures expected between 90 °F and 110 °F. The warning highlights a high risk of heat‑related illness for vulnerable groups and advises staying hydrated, using air‑conditioned spaces, and avoiding strenuous outdoor activity.

A heat advisory also covers the Bay Area and Central Coast, where inland temperatures will rise into the mid‑90s and reach triple‑digit highs in some interior locations. The advisory notes increased fire danger despite higher humidity, a 10 % chance of dry thunderstorms, and a coastal flood advisory for parts of the San Francisco Peninsula and Monterey Bay.

In the Coachella Valley and western Riverside County, monsoonal moisture is bringing higher humidity, cloud cover and the possibility of thunderstorms. An Extreme Heat Warning for western Riverside County warns of sustained high temperatures and elevated heat risk, while local officials urge residents to review emergency plans, secure homes, and avoid driving through flooded roadways.