California Health Survey Details Climate Impact
The 2025 California Health Interview Survey reveals widespread resident exposure to wildfire smoke and extreme heat events.
Updated on Oct. 15, 2026 in Asthma
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The UCLA Center for Health Policy Research has released new survey findings showing that over half of California adults experienced wildfire smoke and extreme heat in the last two years. The data highlights significant environmental and social challenges impacting the health and daily lives of residents across the state.
Why it matters
The survey serves as a vital tool for policymakers to identify health and social drivers, helping to shape state programs that address issues ranging from environmental exposure to healthcare access. By tracking these trends, researchers can better allocate resources to vulnerable populations and improve public health outcomes.
The survey recorded 53.4% of adults reporting wildfire smoke exposure and 52.5% encountering extreme heat over the past two years. Data was collected from a sample of 22,036 adults, 957 adolescents, and 2,673 children.
The players
UCLA Center for Health Policy Research
This academic institution manages the California Health Interview Survey to provide policy-relevant data on the health of state residents.
The details
The report finds that nearly 30% of Los Angeles County adults faced wildfires firsthand over the last two years, with nearly 19% of those who inhaled smoke reporting physical harm. Additionally, the data tracks social barriers, noting that 20.5% of transgender and gender-expansive adults struggle to find a general physician.
Timeline
The UCLA Center for Health Policy Research first launched the annual survey in 2001.
Wildfires occurred in Pacific Palisades and Altadena in January 2025.
The current survey findings utilize data collected throughout 2025.
The UCLA Center for Health Policy Research released the full results in October 2026.
Health Landscape
The California Health Interview Survey provides a longitudinal look at public health, allowing researchers to track how environmental shifts affect resident wellness over time. This report updates the baseline established in prior years, offering a comprehensive view of how climate events are reshaping state health trends.
Residents should be aware of the high prevalence of wildfire smoke and heat events as they plan for future health needs and home safety. Those facing barriers to care, particularly in transgender communities, can use these findings to advocate for improved access to general practitioners.
The takeaway
Californians are increasingly living through extreme weather events that have tangible impacts on physical and respiratory health. Residents should prioritize air quality monitoring and seek out resources to bridge gaps in medical care when facing systemic health access challenges.
Further reading
For more information on respiratory health trends, visit California Asthma.
More information
View the full report and methodology at the UCLA Center for Health Policy Research.
Live Poll
Do you feel your local area is becoming a safer place to live regarding environmental risks?
