Extreme Heat Puts 35 Million People at Risk Across California and Western US

• by Shimanta Das
• October 6, 2026

An intense and dangerous heat wave is gripping California and the western United States, placing an estimated 35 million people under extreme heat warnings and advisories. Los Angeles and San Diego remain under an extreme heat warning, while heat advisories were posted on Sunday for San Francisco and Sacramento. The extreme heat warnings in Southern California will remain in effect until 8 p.m., underscoring the prolonged nature of this event. Authorities are urging residents to take precautions, stay hydrated, and seek cooling centers as temperatures soar to potentially record-breaking levels.

In response to the worsening impacts of climate change-driven extreme heat, Governor Gavin Newsom announced new strategies to protect California residents and communities. The plan, titled “California’s Extreme Heat Action Plan: A State Strategy for Protecting Californians from Extreme Heat,” outlines current efforts to lower risks to people’s health, natural resources, and the economy, while recommending future actions to build community resilience. “Californians are feeling the impacts of extreme heat earlier, longer, and more intensely than ever before,” said Governor Newsom. The plan emphasizes coordination between Cal OES and state agencies to share life-saving information with frontline communities, including details on cooling centers and heat-illness prevention. These efforts ensure resources are available when seconds count, helping emergency personnel respond more quickly to small fires before they become major incidents.

Meanwhile, the weather story is not limited to the West. Rounds of heavy rain are affecting parts of the Gulf Coast and Southeast, with flood watches remaining in effect from southeastern Louisiana to southern Georgia, including New Orleans, Mobile, Tallahassee, and Brunswick. Torrential rain could also trigger potentially significant flash flooding across portions of South Texas on Sunday afternoon and into the evening. This dual threat of extreme heat and flooding highlights the growing volatility of weather patterns across the country.

As the heat wave persists, officials continue to monitor conditions and remind the public to check on vulnerable neighbors, avoid outdoor activities during peak hours, and follow local guidance. The combination of extreme heat and flooding risks serves as a stark reminder of the need for robust climate adaptation strategies. For now, millions remain under threat, and the coming days will be critical for safety and resilience efforts across the affected regions.