The Fifth Assessment’s Regional Reports bring together the latest climate science, community input, and adaptation opportunities to meet the needs of communities across nine California regions. These reports can inform regional and local vulnerability assessments, adaptation planning, and community resilience efforts. The Regional Reports include analyses of climate projections and impacts to natural systems, built systems, and social systems.
Select a region below to link to each report and any supplementary materials.
Reports
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Central Coast
The Central Coast Regional Report includes climate science, impacts, and adaptation information for Monterey, San Benito, San Luis Obispo, Santa Barbara, Santa Cruz, and northern…
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Inland Deserts
The Inland Deserts Regional Report includes climate science, impacts, and adaptation information for Imperial, Inyo, east Kern, northeast Los Angeles, east Mono, San Bernardino, and…
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Los Angeles
The Los Angeles Regional Report includes climate science, impacts, and adaptation information for southwest Los Angeles, Orange, west San Bernardino, west Riverside, and south Ventura…
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North Coast
The North Coast Regional Report includes climate science, impacts, and adaptation information for Del Norte, Humboldt, Lake, Mendocino, Siskiyou, and Trinity counties. At the confluence…
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Sacramento Valley
The Sacramento Valley Regional Report includes climate science, impacts, and adaptation information for Butte, Colusa, Glenn, west Placer, Sacramento, Shasta, east Solano, Sutter, Tehama, Yolo,…
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San Diego
The San Diego Regional Report includes climate science, impacts, and adaptation information for San Diego County. San Diego, California’s southernmost coastal county, has a Mediterranean…
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San Francisco Bay Area
The San Francisco Bay Area Regional Report includes climate science, impacts, and adaptation information for Alameda, Contra Costa, Marin, San Francisco, Napa, San Mateo, Santa…
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San Joaquin Valley
The San Joaquin Valley Regional Report includes climate science, impacts, and adaptation information for west Fresno, west Kern, Kings, west Madera, Merced, San Joaquin, Stanislaus,…
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Sierra Nevada
The Sierra Nevada Regional Report includes climate science, impacts, and adaptation information for Alpine, Amador, Calaveras, El Dorado, east Fresno, central Kern, Lassen, east Madera,…