California's Fourth Climate Change Assessment

What is the Climate Assessment?

California’s Climate Change Assessments contribute to the scientific foundation for understanding climate-related vulnerability at the local scale and informing resilience actions, while also directly informing State policies, plans, programs, and guidance, to promote effective and integrated action to safeguard California from climate change.

Assessment Overview

California’s Fifth Climate Change Assessment is Underway!

For information and future updates, please visit Climate Assessment, Science, and Research - Office of Planning and Research.

Read more at opr.ca.gov

Key Findings

California’s Fourth Climate Change Assessment provides information to build resilience to climate impacts, including temperature, wildfire, water, sea level rise, and governance. Here you can view a snapshot of the key findings of the Fourth Assessment. For additional information, please download the Key Findings brochure, “California's Changing Climate 2018.”

File Size: PDF 11.1 mb  |  Published: August 27, 2018

Download Brochure   Descagar Folleto

Statewide Summary Report

The Statewide Summary Report presents an overview of the main findings from California’s Fourth Climate Change Assessment, to translate the state of climate science into useful information for action. This report presents findings in the context of existing climate science, including strategies to adapt to climate impacts and key research gaps needed to spur additional progress on safeguarding California from climate change.

File Size: PDF 10.2 mb Report #: SUM-CCCA4-2018-013  |  Published: January 16, 2019

Download Full Report