San Diego, California – A surge of unusual early-season heat is set to push temperatures into the 90s across inland Southern California beginning Thursday morning, raising the risk of heat-related illness through Friday evening.
According to the National Weather Service in San Diego, a Heat Advisory remains in effect from 10 a.m. Thursday until 8 p.m. Friday for coastal and valley communities across San Diego County, Orange County, and the Inland Empire. Inland valleys including Riverside, San Bernardino, Escondido, and El Cajon could climb into the low to mid-90s, while coastal cities such as San Diego, Oceanside, and Huntington Beach are expected to reach the low to mid-80s.
The warm spell will also bring elevated overnight temperatures, limiting cooling after sunset and increasing heat stress for residents without access to air conditioning. Cities including Anaheim, Irvine, Fontana, Rancho Cucamonga, and Chula Vista may experience especially warm conditions during the afternoon hours.
Health officials urge residents to drink plenty of water, limit strenuous outdoor activity during the hottest part of the day, and check on elderly neighbors or relatives. Wearing lightweight clothing and taking breaks in shaded or air-conditioned spaces can reduce the risk of heat exhaustion.
Forecasters say the unusually warm pattern could continue into the weekend, and additional heat alerts may be issued if temperatures remain elevated across Southern California.
