NWS Issues Extreme Heat Warning for Santa Barbara, San Luis Obispo, Ventura Counties

After several days of rising temperatures triggered by an early-season heatwave across parts of California, an extreme heat warning has been issued for Santa Barbara, San Luis Obispo, and Ventura counties.

The National Weather Service (NWS) has issued an extreme heat warning, with temperatures expected to range from 96°F to 104°F.

These conditions are far above typical March temperatures, making the heat wave especially concerning.

Extreme Heat Warning in Effect Through Friday

The warning remains in effect until 8 p.m. PT Friday, extending extreme heat exposure for several consecutive days. Limited overnight relief is expected, with temperatures forecast to remain warm.

These conditions are expected to be most intense in inland valleys and foothill communities, compared to coastal regions.

The lack of overnight cooling will further aggravate the situation, especially for residents without access to air conditioning.

Health Risks Rise as Overnight Relief Remains Limited

The NWS advised residents to stay safe, noting the risk of heat-related illness increases significantly during extreme heat, particularly in the afternoon.

“There is a high risk for dangerous heat illness for anyone, especially for the very young, the very old, those without air conditioning, and those active outdoors. There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors,” the NWS noted in its warning.

Residents are urged to adjust their schedules and limit strenuous outdoor activities to early morning or evening hours.

Residents are further advised to drink plenty of fluids and stay in air-conditioned spaces, limiting outdoor activity during the hottest parts of the day. Wear lightweight, loose-fitting clothing to manage body temperature. 

Officials stressed never to leave children or pets unattended in vehicles, as temperatures inside can rise rapidly and become life-threatening.

The NWS notes that heat remains one of the leading weather-related causes of death in the U.S.

California has recorded 65 pediatric vehicular heat deaths between 1998 and 2025, according to available data. Officials urged residents to stay informed and take necessary precautions as the heat continues.