On June 5, 2018 the  Climate Change Commission  adopted the  Sea Level Rise Guidance  and accompanying  Climate Change Brief . This is the first major publication released by the Climate Change Commission in response to the City administration's request in February 2018 to provide guidance on the City's infrastructure risks and exposure as a result of expected sea level rise.

On June 5, 2018 the Climate Change Commission adopted the Sea Level Rise Guidance and accompanying Climate Change Brief. This is the first major publication released by the Climate Change Commission in response to the City administration's request in February 2018 to provide guidance on the City's infrastructure risks and exposure as a result of expected sea level rise.

O‘ahu agenda setting workshop Report

On June 8, 2017, the Resilient O‘ahu Workshop introduced 100RC to a diverse group of 140 city stakeholders drawn from 19 sectors and representing 117 unique organizations. They shared knowledge and produced initial recommendations to help inform a Resilience Strategy.

At the Workshop's City Resilience Diagnostic exercise, O‘ahu's top strengths and weaknesses were identified.

FY 2017 Citizen-Centric Report

The EPA's Climate Change is real webSite

EPA's Climate Change Indicators report tracks our changing climate and highlights impacts to our health and environment, locally and nationwide.

The information on this page is the result of decades of work studying climate change and developing approaches to protect the environment by the United States Environmental Protection Agency and other federal agencies. While this information was removed from the EPA’s website on April 28, 2017, Mayor Caldwell and Climate Mayors across the country are committed to protecting citizens’ access to the data and science behind climate change and working together to prevent it. For more information, visit

FY 2017 Service Efforts and Accomplishment Report

The State of the Environment

A film by Hawaiʻi Environmental Funders Group + Wade Robson Creations.

sunset beach Erosion Presentation

Following unprecedented erosion at Sunset Beach Park on Oʻahu’s North Shore in the winter of 2017, the City and County of Honolulu took several steps to mitigate further immediate erosion and address public safety concerns posed by damaged or endangered facilities. This presentation outlines those actions taken, and explores the options and scenarios moving forward.

Hawai‘i Sea Level Rise Vulnerability &
Adaptation Report

The Hawai‘i Climate Change Mitigation & Adaptation Commission (Climate Commission) has accepted its first major report since its formation in fall 2017. The Sea Level Rise Vulnerability & Adaptation Report is a comprehensive 304-page-long description of where Hawai‘i is today and where we will be in the future as sea level rise (SLR) increases with global warming.

The report, developed under the leadership of the DLNR Office of Conservation and Coastal Lands (OCCL), was initially mandated by Act 83 in 2014 and was expanded by Act 32 in 2017 and provides the first state-wide assessment of Hawai‘i’s vulnerability to sea level rise.  It includes recommendations to reduce exposure to sea level rise along with recommendations to increase our capacity to adapt. 

Chicago Climate Charter

On December 4-6, 2017, Chicago Mayor Rahm Emanuel held the North American Climate Summit in concert with the Global Covenant of Mayors for Climate and Energy partners, bringing together leaders from the U.S., Canada and Mexico to sign the Chicago Climate Charter and commit to addressing climate change at the local level.

Mayors gathered for the Summit were invited to make commitments to move forward with significant emissions reductions regardless of action taken by their respective federal governments. Working together, we harnessed existing climate goals and created a regional roadmap for climate leadership.

National Citizen Survey

The ninth NCS captures residents’ opinions within the three pillars of a community--Community Characteristics, Governance and Participation, and across eight facets of community--Safety, Mobility, Natural Environment, Built Environment, Economy, Recreation and Wellness, Education and Enrichment, and Community Engagement. The citizen survey is comprised of four reports: Community Livability, Dashboard Summary of Findings, Trends over Time, and Technical Appendices. 

Mayors for Solar Energy Letter

Mayor Kirk Caldwell has co-signed a public letter with the Mayors for Solar Energy to reiterate his support for clean, renewable energy. The bipartisan group of 180 U.S. mayors, representing cities large and small in 42 states, resolve to make solar power a key element of their communities’ energy plans and call on others to embrace clean energy from the sun.

“Solar on thousands of homes and government buildings is helping Honolulu reach our sustainable energy goals,” said Mayor Caldwell. “We are on the front lines of sea level rise and other climate change effects and we must drastically reduce our use of fossil fuels. My administration is working to expedite permits for photovoltaic and battery storage systems and the results are clear.”

The move by mayors to promote solar power comes at a time when the federal administration is rolling back Obama-era policies aimed at reducing climate emissions and encouraging renewable energy.

Economic and Environmental comparison of water heating options

Energy and Electrical Code Updates Stakeholder Presentation

Solar Hot Water Heater Analysis

Hawai‘i sea level rise viewer

The Hawaiʻi Sea Level Rise Viewer provides an online atlas to support the Hawaiʻi Sea Level Rise Vulnerability and Adaptation Report (Report) that was mandated by Act 83, Session Laws of Hawaiʻi (SLH) 2014 and Act 32, SLH 2017. Please visit the Hawaiʻi Climate Adaptation Portal website to view the full report and for more information on climate mitigation and adaptation.

Hawai‘i green growth aloha+ challenge

Hawai'i launched the Aloha+ Challenge, a statewide commitment to sustainability, with the leadership of the Governor, four county mayors, Office of Hawaiian Affairs, State Legislature, and Hawai‘i Green Growth public-private partners across the state. The Aloha+ Challenge: He Nohona ‘Ae‘oia, A Culture of Sustainability builds on Hawai‘i's history of systems thinking, indigenous knowledge, and successful track record on sustainability to identify six ambitious goals to be achieved by 2030 in clean energy transformation, local food production, natural resource management, solid waste reduction, smart sustainable communities, and green workforce and education.

More than 200 mayors urge EPA not to repeal the clean power plan

Leaders from the City and County of Honolulu, Hawaiʻi County, Maui County, and Kauaʻi County have joined 233 mayors, from 46 US states and territories, representing over 51 million Americans to oppose the Trump Administration’s proposed repeal of the Clean Power Plan (CPP). 

Honolulu Mayor Kirk Caldwell, Hawaiʻi County Mayor Harry Kim, Maui County Mayor Alan Arakawa, and Kauaʻi County Mayor Bernard P. Carvalho Jr. all signed onto a letter in opposition to the Environmental Protection Agency’s proposed Repeal of Carbon Pollution Emission Guidelines for Existing Stationary Sources: Electric Utility Generating Units.

Signing the letter signals Hawaiʻi’s continued commitment to transition away from dependence on fossil fuels and reinforces a 2015 state law that requires 100 percent of Hawaiʻi’s electricity to be generated by renewable sources by 2045. Hawaiʻi’s 2045 goal was the nation’s first such benchmark.

Hawaiʻi is the only state that entirely supports the Climate Mayors network through its four mayors’ participation. In signing this letter opposing repeal of the CPP, they are joined by other members of the Climate Mayor’s network (, which includes Los Angeles, Houston, Portland, New York, and Puerto Rico.

The actions announced today by the chief executives of the four counties are in alignment with the state of Hawaiʻi’s recent commitment to the goals of the Paris Agreement that seeks to reduce GHG emissions and keep global warming below 1.5 degrees Celsius. Sea level rise is contributing to coastal erosion that recently destroyed part of a historic cemetery on Maui and caused a bike path on the North Shore of Oʻahu at Sunset Beach to partially collapse; and according to the recently published Hawaiʻi Sea Level Rise Vulnerability and Adaption Report, the expected future sea level rise is estimated to cost $19 billion in “loss of land and structures” along with 6,500 flooded structures, 38 miles of flooded major roads, and 19,800 displaced people.

Climate Change Presentation by Commissioner Dr. Charles Fletcher

Commissioner Dr. Charles Fletcher provides a candid assessment of the current state of climate change, and why the risk posed (especially to Hawai‘i) is much greater than the picture portrayed by the general media. While there is a revolution in clean energy that is sweeping the world—which is the only way out of this situation—it is not moving forward fast enough to prevent very dangerous climate change impacts that we are already beginning to see manifest, including the recent rain event on Kauaʻi and here in East Honolulu. We are facing a future of heat waves, accelerating sea level rise, superstorms, and in all likelihood a global refugee crisis. Dr. Fletcher will conclude by discussing the strong actions being taken globally and locally with a realization that we have no choice but to keep trying, harder and more radically, if we want our children to inherit a livable world.