Extreme Heat Warning Issued as SDG&E Warns of Possible Power Shutoffs Through Sunday

The National Weather Service has issued an Extreme Heat Warning for portions of San Diego County as a combination of dangerous heat and Santa Ana winds threatens the region through at least Thursday, with SDG&E warning customers to prepare for possible Public Safety Power Shutoffs through Oct. 5.

The County of San Diego urged residents Thursday to take precautions against heat-related illness and to prepare for potential power outages. Forecasters expect highs in the 90s near the coast and triple digits in inland valleys, with warm overnight lows making it harder for residents to cool down.

"Hot, dry and windy conditions often overlap with Red Flag periods, increasing the chance of fast-moving wildfires," the county said in its alert. SDG&E is monitoring conditions and may activate shutoffs if wildfire risk escalates. Customers can check the utility's PSPS Dashboard for real-time information on potentially impacted communities.

In response, the City of San Diego announced Friday it is extending hours at several libraries and recreation centers serving as cooling centers. On Friday and Saturday, all locations will remain open until 8 p.m. The County of San Diego maintains its own list of designated Cool Zones — including 33 branch libraries and community centers — for residents outside city limits.

The county urged residents to stay in air-conditioned spaces during peak heat, drink plenty of water, avoid sugary or alcoholic drinks, and never leave children, older adults, or pets in vehicles. Signs of heat illness include dizziness, nausea, confusion, heavy sweating, and headaches. Residents should sign up for emergency alerts at AlertSanDiego.org.

Fire-safety precautions were also emphasized: residents should avoid activities that can spark fires, secure trailer chains, dispose of cigarettes safely, and keep household emergency go-kits ready.