City of Portland and Multnomah County Climate Change Preparation Strategy - Risk and Vulnerabilities Assessment

From the City of Portland and Multnomah County, Oregon, the Risk and Vulnerabilities Assessment provides a detailed review of the potential climate change impacts to health and human systems, natural systems, infrastructure and the built environment in the region, as well as an overview other sectors such as energy, the economy, food systems and climate migrants. This report provides the climate impact data and foundation for the City and County's Climate Change Preparation Strategy, which outlines key objectives and actions to build resilience into the City and County’s operations, services and infrastructure.


Chapter 2 - Climate Equity - outlines the challenges and opportunities to ensure that climate change preparation efforts serve all residents, and particularly populations most vulnerable to extreme heat and flooding. The report explains that in Portland, communities of color and low-income communities experience disparities that will be exacerbated by the impacts of climate change. These disparities include greater risk of poor health, reduced access to housing, un- and under-employment, limited access to transportation options and parks, higher mortality rates, and the legacy of inequitable public policy.

Figure 3 on page 8 maps vulnerable communities and relative access to “complete community” services that are likely to help improve resilience - including transit, sidewalks, food, schools, and businesses.

Portland Vulnerable Pop Map


A chapter on Climate Risks reviews the expected risks and impacts associated with hotter, drier summers with more high-heat days, and warmer winters with the potential for more intense rain events. Projections are detailed for increased temperatures and frequency of high-heat days, drought, wildfire frequency and intensity in summer months; and increased incidence and magnitude of damaging floods and landslides in the winter.  Related objectives and adaptation strategies are given for each impact.  These same objectives are detailed in the Preparation Strategy.

A Vulnerability Assessment by Sector includes the findings of how climate change is expected to impact human systems, natural resources, and the built environment and infrastructure.  Each comprehensive sector assessment offers additional adaptation objectives for the City and County. The report also provides an overview of potential impacts in other areas, including food systems, population shifts, energy systems and the economy.


Publication Date: September 16, 2014

Related Organizations:

  • City of Portland, Oregon
  • Multnomah County, Oregon


Resource Category:

Resource Types:

  • Assessment

States Affected:


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