Search Climate Insights Directory

Climate Central's analysis of 65 major U.S. cities reveals that approximately 76% of the 6.2 million K-12 public school students in these areas attend school in 'extreme urban heat zones,' where the built environment adds at least 8°F of additional heat. The average student in these cities attends school in a neighborhood that is 8.3°F hotter due to the built environment, with the highest average additional heat found in New York City (9.6°F). The report highlights that children are particularly vulnerable to heat-related health risks, which can impair academic achievement and development, while noting that 41% of public school districts need to update or replace HVAC systems in at least half of their schools.

The document argues for a "just land transition" in California to address groundwater depletion, which may require repurposing up to 1 million acres of irrigated agriculture. It outlines a framework based on community-centered principles and provides a roadmap of interventions for the state legislature, regulatory agencies, local governments, and philanthropy to ensure benefits reach frontline communities and agricultural workers.

The report finds that July 2024 temperatures were elevated in the eastern and western thirds of the United States, with the West Coast showing particularly high anomalies. Using the Climate Shift Index (CSI), the analysis identifies the Southwest as having the strongest climate signal, with cities averaging at least 14 days where temperatures were at least three times more likely due to climate change. Specific cities like Spokane, Washington, and Reno, Nevada, showed significant temperature anomalies and long-term warming trends since 1970.

The document positions cities as central actors in the global movement to end fossil fuel dependence, noting that while they are major emitters, they can lead through 'city diplomacy' and local policy. It outlines 21 key recommendations divided into two main categories: enhancing city diplomacy and removing the 'social licence' of the fossil fuel industry, and implementing sectoral decarbonisation in transportation, energy, the built environment, and waste management. The brief emphasizes that urban action must be coupled with national-level pressure to ensure a just transition for workers and marginalized communities.

The briefing highlights the economic and environmental value of urban nature—such as forests, street trees, and wetlands—as a tool for climate mitigation and adaptation. It asserts that the global value of urban nature's benefits is nine times its costs and provides specific examples from Sacramento, Ahmedabad, and Curitiba to demonstrate how nature-based solutions can reduce building energy demand, lower the carbon footprint of stormwater management, and decrease transportation emissions. The document concludes by calling for an increase in annual investment in urban nature projects from $32 billion to $135 billion by 2030 to realize an estimated $2 trillion in annual net benefits.

Climate Central analysis shows that 72% of 246 evaluated U.S. locations have seen an increase in the amount of rain falling on their annual wettest day since 1950, with the most significant increases occurring in the Gulf Coast and Mid-Atlantic. The document links these trends to rising temperatures, noting that for every 1°F increase, the atmosphere holds approximately 4% more moisture. It highlights the severe impacts of these events, including $43 billion in flood damages from 2016-2020 and disproportionate risks for Black, Brown, Indigenous, and poor communities, particularly in redlined areas where flood risk is 25% higher.

The author argues that climate reporting must include climate justice to accurately reflect how the climate emergency is tied to existing social and racial inequities. The guide advises reporters to move beyond portraying marginalized communities as victims, to diversify expert sources, and to invest significant time in building trust with sources to avoid misrepresentation. It emphasizes that the systems driving climate change—such as extractive industries and discriminatory housing—are the same systems that create race and class divides.

The report identifies significant barriers to EV adoption for California's multi-unit dwelling (MUD) residents, including outdated electrical infrastructure, split incentives between landlords and tenants, and a lack of private capital. It proposes a multi-pronged approach to increase access through updated building codes, streamlined permitting, utility-led 'make-ready' investments, and the use of low-power Level 1 charging to reduce costs and grid strain. The document emphasizes that achieving California's goal of 5 million zero-emission vehicles by 2030 requires addressing these equity gaps, as MUD residents—particularly renters—will be a critical market segment for growth after 2025.

SEI is supporting the California Water Action Plan by developing water allocation models, such as the South Fork Eel River Water Allocation Model (SEWAM), and the eWRIMS Analyzer tool. These tools allow policymakers to quantify trade-offs between ecosystem needs, such as in-stream flow requirements for species restoration, and the water availability for agriculture and rural communities. The work involves explicitly representing every water right to assess legal and illegal water use, including cannabis diversions, and using visualization software to analyze these impacts under various climate conditions.

The document details how climate change is increasing the frequency and severity of heat waves in the United States, leading to higher mortality rates and significant disruptions. It highlights the disproportionate vulnerability of children, the elderly, low-income and minority populations, and outdoor workers. Beyond health, extreme heat damages transportation infrastructure, reduces agricultural yields, and strains the electricity grid, necessitating a transition to low-carbon energy solutions and adaptive urban design to mitigate these risks.

The statement opposes the Trump administration's proposal to open U.S. ocean waters, including areas off the California coast, to offshore oil and gas drilling. It highlights the environmental and economic risks, citing the Deepwater Horizon disaster as a precedent for potential catastrophe. The text advocates for the passage of California state legislation that would block the development of new fossil fuel infrastructure, such as pipelines, on coastal lands under the State Lands Commission's authority to effectively halt the expansion of drilling.

The document details the positive outcomes of institutional food procurement policies, showing that local sourcing increases regional economic output and job creation. It highlights environmental benefits, such as reduced greenhouse gas emissions and water use through meat reduction, and projects significant health improvements—including lower sodium intake and reduced risks of type 2 diabetes and colorectal cancer—for students and adults in Los Angeles County. Additionally, it analyzes the increasing availability of antibiotic-free chicken in the US supply chain and compares the cost of procuring such meat against the high medical costs of treating antibiotic-resistant infections.

The document outlines technical recommendations for the California Air Resources Board (ARB) on monitoring, reporting, and verification (MRV) and accounting for CO2 sequestration. It emphasizes the priority of subsurface plume tracking over surface monitoring, argues that only anthropogenic CO2 should be credited, and suggests pragmatic 'haircut' approaches to credit reductions in the event of atmospheric leakage. For EOR applications, it clarifies that recycled CO2 should not require mass balance accounting and stresses the critical importance of wellbore integrity in brownfields.

California is experiencing significant damages from climate change, including increased heat-related mortality, more frequent and severe wildfires, and rising sea levels. The state faces critical water shortages, record-low snowpacks in the Sierra Nevada, and a high risk of extinction for 83 percent of its native freshwater fish species.

The report outlines a three-step approach for improving the performance of publicly-owned utilities (POUs). The first step involves 'no regrets' actions, such as engaging diverse stakeholders to define goals and using Integrated Resource Plans (IRPs) to balance reliability, cost, and environmental targets. The second step focuses on governance evolutions, specifically delineating the roles of boards and management and implementing board self-evaluations. The third step suggests more drastic measures for lagging performance, including revenue decoupling to support energy efficiency, performance-based employee compensation, and the use of third-party non-profit entities for specific utility functions.

The report argues that smart land use policy is critical for California to meet its 2030 decarbonization goals. Using the RapidFire model and E3 California Pathways data, the study finds that 'More Compact' and 'Infill Focus' scenarios can lead to statewide emissions reductions of 40-41% below 1990 levels when combined with aggressive energy technology deployment. Beyond climate targets, smart growth is projected to deliver significant co-benefits, including billions of dollars in household and infrastructure cost savings, improved public health outcomes through reduced air pollution, and the preservation of greenfield land. The authors recommend that the California Air Resources Board (CARB) strengthen emissions reduction targets under SB 375 and provide substantial funding to support cities and regions in implementing target-compliant land use plans.

The report argues that the proposed Oakland Bulk and Oversized Terminal (OBOT) poses significant risks to public health, water security, and local ecosystems, particularly if used to export coal. The author highlights that current design plans are conceptual and lack enforceable controls for dust and emissions. Key concerns include the consumption of 79.2 million gallons of water annually for dust control during a record drought, the release of up to 18,300 tons of coal dust per year within California from uncovered rail cars, and increased cancer risks from diesel particulate matter in West Oakland. Additionally, the report notes that the project's scale would cause significant traffic congestion at 55 at-grade rail crossings and create substantial noise pollution. The author concludes that these impacts were not addressed in the project's CEQA review.

The study utilizes integrated basin-scale models to analyze the water-energy-climate nexus in Sacramento, California. It finds that hot dry years, characterized by a 4C temperature increase and 25% precipitation decrease, would lead to a more than 35% increase in regional electricity imports due to constrained local power production.

The report identifies non-hardware balance of system costs, which can reach 40% of installed system costs, as a significant barrier to rooftop solar adoption. It recommends the adoption of standardized frameworks such as the Solar ABCs Expedited Permit Process for permitting, the IREC Model Interconnection Procedures for grid connection, and the NNEC design criteria for net metering. The document highlights Colorado as a leader in solar-friendly policies, citing the Fair Permit Act's fee caps and the state's removal of net metering capacity limits for systems up to 120% of annual on-site consumption.

The report warns that California faces significant risks from global warming, with projected temperature increases between 3°F and 10.5°F by the end of the century. These changes threaten to severely reduce Sierra Nevada snowpack, increase the frequency of large wildfires, degrade air quality, and disrupt the state's $30 billion agriculture industry. The document emphasizes that while some changes are unavoidable, the most severe consequences can be avoided by reducing heat-trapping emissions to levels that keep warming within the lower range of 3 to 5.5°F.