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 counties.
The Los Angeles region encompasses the greater Los Angeles area, including most of LA County, Orange County, western San Bernardino and Riverside counties, and southern Ventura County. It is home to 16.6 million people, comprising 43% of California’s population and making it the most populous area of the state.
Since time immemorial, Indigenous Peoples have cared for and stewarded the region’s lands and waters, and it remains the homelands for diverse Tribal communities who continue to exercise sovereignty, maintain cultural relationships to place, and advance climate stewardship. Today, the Los Angeles region is one of the most diverse regions in the US but also faces affordability challenges and economic inequality. Its economy supports entertainment, international trade, defense contracting, medicine, technology, and other industries.
The LA Region is also one of the most topographically diverse regions in the United States, ranging in elevation from sea level to over 10,000 feet and creating diverse microclimates. Its natural landscapes include beach ecosystems and wetlands, chaparral, inland oak savannahs, and montane forests. This leads to risks from a wide range of climate hazards.
Los Angeles Regional Report
Coordinating Lead Author
Jesse Norris, University of California, Los Angeles