Climate Change

Indicators of Climate Change in California

The Office of Environmental Health Hazard Assessment researches and presents indicators in periodic reports describing how California’s climate is changing and how these changes are affecting the state. Indicators are scientifically-based measurements that track trends in various aspects of climate change.

Indicators of Climate Change: Impacts on California Tribes

OEHHA recognizes the value of Tribal knowledge in reporting on, and raising awareness of, climate impacts.

Human Health Impacts of Climate Change

OEHHA focuses on human health studies relating increased temperatures to adverse health outcomes such as death and illness including hospital visits, emergency room visits, and birth defects. OEHHA has contributed to the growing body of literature linking deleterious health effects to increasing temperatures and heat waves. These studies have helped identify groups who are vulnerable to heat-related mortality and illness.

Recent Research on Climate Change in California: A bibliography

OEHHA has compiled information relevant to climate change and its impacts in an annotated bibliography with an emphasis on California. This annotated bibliography is intended as a source of current and emerging scientific information on climate change for environmental and public health agencies, the research community, non-government organizations, and the public.

2018 Report: Indicators of Climate Change in California

The third edition of the report, published in 2018, presented 36 indicators grouped into four categories: human-influenced drivers of climate change, such as greenhouse gas emissions; changes in the state’s climate; impacts of climate change on physical systems, such as oceans and snowpack; and impacts of climate change on biological systems – humans, vegetation and wildlife.

Reports, Notices, Documents

Feb 3, 2021: Exploring California Climate Change Connections
This free virtual, two-day workshop highlights scientific evidence and information relating to climate change and its impacts, with a focus on recognizing and describing how the multiple aspects of climate change are interconnected.
Feb 3, 2021: Summary: Exploring California Climate Change Connections
Summary from a December 2020 virtual workshop to provide a forum for exploring the scientific evidence for the interconnections between climate change and its impacts, and the implications for California. Discussions at the workshop will inform the 2021 edition of the report, Indicators of Climate Change in California.

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