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The Union of Concerned Scientists finds that significant portions of the U.S. East and Gulf Coast electricity grids are currently exposed to coastal flooding, a risk that will increase as sea levels rise. In the central Gulf Coast specifically, 188 major substations and 20 power plants are currently at risk from a major storm. The report argues that relying on historical flood data is insufficient and recommends a combination of infrastructure adaptation (protection, accommodation, and retreat) and the deployment of decentralized clean energy solutions—such as microgrids and solar with storage—to ensure community resilience and reduce the carbon emissions driving sea level rise.

The report finds that significant portions of the U.S. East and Gulf Coast electricity grids are exposed to coastal flooding, with the Delaware Valley specifically facing risks to 79 substations and 35 power plants under current Category 3 hurricane conditions. It warns that reliance on historical flood data underestimates future risks as sea levels rise, potentially leading to widespread, long-lasting power outages. To address this, the authors recommend a combination of infrastructure adaptation (protection, accommodation, and retreat) and the deployment of decentralized clean energy technologies—such as solar with storage, combined heat and power (CHP) plants, and microgrids—to ensure critical facilities remain powered during grid failures while reducing the carbon emissions that drive sea level rise.

The report examines how rising sea levels and storm surges threaten critical electricity infrastructure, such as substations and power plants, in five major U.S. coastal regions. It finds that significant portions of the grid are already exposed to flooding, which can lead to widespread and prolonged power outages. The authors argue that current planning relies on outdated historical data and recommend a shift toward decentralized, resilient clean energy systems—including microgrids, energy storage, and combined heat and power plants—alongside infrastructure adaptation strategies like protection, accommodation, and retreat.

The Union of Concerned Scientists finds that significant electricity infrastructure along the U.S. East and Gulf Coasts is currently exposed to storm surge, a risk that will increase with sea level rise. In the South Carolina Lowcountry, 54 major substations and seven power plants are currently at risk. The report advocates for adaptation strategies—protection, accommodation, and retreat—and the deployment of decentralized clean energy technologies like microgrids and energy storage to ensure community resilience and reduce carbon emissions.

The Union of Concerned Scientists finds that significant portions of the U.S. East and Gulf Coast electricity grids are exposed to storm surge, a risk that will increase as sea levels rise. In southeastern Florida, the number of major substations at risk from a Category 3 storm is projected to triple by 2070. The report advocates for a shift from centralized grids to decentralized, resilient power systems—such as microgrids and renewable energy with storage—to protect critical facilities and reduce carbon emissions.

The report finds that significant portions of the U.S. East and Gulf Coast electricity grids are currently exposed to storm surge, with risks increasing as sea levels rise. In southeastern Virginia, 43 percent of major substations and four power plants are at risk today. The authors advocate for a shift from centralized grids to decentralized, resilient power systems—including microgrids and renewable energy with storage—to maintain critical services during outages and reduce the carbon emissions driving climate change.

The Union of Concerned Scientists (UCS) analysis finds that two-thirds of U.S. states may be exposing electricity consumers to financial risks due to overreliance on natural gas. These risks include price volatility, potential carbon pricing costs, and the possibility of stranded assets such as underused plants and pipelines. The report rates states across five categories, identifying Florida as the only state with a "High" risk rating in all five. To mitigate these risks, the report advocates for prioritizing renewable energy and energy efficiency over natural gas as a primary solution for carbon reduction under the federal Clean Power Plan.

A coalition of 290 organizations and individuals opposes H.R. 1734, asserting that the bill would weaken the U.S. Environmental Protection Agency's (EPA) 2014 coal ash rule. The signatories argue the legislation would delay health protections, eliminate public access to information, and remove national standards for drinking water protection, thereby increasing risks to vulnerable communities and the environment.

The letter expresses concern over Phillips 66's limited disclosure of physical climate risks in its SEC Form 10-K filings, specifically highlighting the vulnerability of the Bayway refinery in New Jersey to sea level rise and storm surges.

The document describes the four primary components of the US electricity grid: individual generators, transmission lines, distribution networks, and consumer load. It details the technical differences between power sources, such as the low flexibility of coal and nuclear plants compared to the rapid ramping of natural gas plants. The text outlines the regulatory roles of state Public Utility Commissions (PUCs) and the federal Federal Energy Regulatory Commission (FERC), and notes the three main US transmission networks: the Western Interconnection, the Eastern Interconnection, and ERCOT. It also traces the grid's history from the victory of alternating current (AC) over direct current (DC) to the 'restructuring' of the 1970s that allowed for wholesale competition. Finally, it identifies potential improvements through energy storage, smart meters, and distributed generation like residential solar panels.

The document outlines the technical approach used by the Union of Concerned Scientists to analyze climate risks at specific refineries owned by Valero, Phillips 66, Exxon Mobil, Marathon Petroleum, and Chevron. It details the data sources for refinery capacity and boundaries, the sea level rise projections based on the IPCC's RCP 4.5 scenario, and the use of the National Weather Service's SLOSH model to simulate storm surge from Category 1–5 hurricanes. Additionally, it explains the criteria used to score company disclosures of physical climate risks based on SEC filings and Ceres methodology.

The report examines the vulnerability of U.S. coastal oil refineries to sea level rise and storm surge, focusing on five major companies: Valero, Phillips 66, Exxon Mobil, Marathon Petroleum, and Chevron. It argues that these companies fail to adequately disclose material physical climate risks to the SEC, despite guidance issued in 2010. The analysis uses SLOSH MOM modeling to demonstrate that current and future sea level rise increases the likelihood of facility inundation and operational disruptions. The report highlights the resulting financial risks for investors and the environmental and health risks for neighboring communities, particularly those in the Gulf Coast region.

An analysis of 52 tide gauges along the US East and Gulf Coasts indicates a steep increase in tidal flooding events over the next 30 years. By 2030, over half of the studied communities are projected to experience at least 24 tidal floods annually. By 2045, one-third of these locations could face flooding more than 180 times per year, with some areas in the mid-Atlantic potentially inundated more than 10 percent of the time. The report argues that while local flood-proofing and federal resilience investments are necessary, the only long-term solution to slow sea level rise is the swift reduction of global warming pollution.

The report warns that tidal flooding will become chronic and disruptive for many US coastal communities by 2030 and 2045, necessitating urgent local adaptation and national carbon emission reductions.

The report details the expansion of solar energy in the U.S., focusing on rooftop photovoltaic (PV) systems, large-scale PV, and concentrating solar power (CSP). It highlights significant cost reductions, the role of state and federal incentives, and the environmental benefits of transitioning from fossil fuels to solar, while addressing grid integration challenges and land-use impacts.

The U.S. electricity grid is increasingly vulnerable to extreme weather events, with the average annual cost of severe weather rising from $20 billion in the 1980s to $85 billion in the 2010s. Aging infrastructure, graded D+ by the American Society of Civil Engineers in 2013, is susceptible to sea level rise, wildfires, droughts, and heat waves. The report highlights that thermal power plants are particularly at risk due to their heavy reliance on water for cooling, which can lead to production cutbacks or shutdowns when water is too warm or scarce. To improve resilience, the document recommends 'hardening' measures, such as sea walls and burying power lines, alongside the adoption of distributed renewable energy and energy efficiency to reduce overall demand and carbon emissions.

The Union of Concerned Scientists (UCS) evaluates the NRC's 2013 performance, noting a decrease in the number and severity of 'near-misses' but highlighting critical inconsistencies in enforcement. While the NRC successfully managed the restart of the Fort Calhoun plant and identified gaps in aging component oversight, it is criticized for allowing the Diablo Canyon and Oconee plants to operate despite known seismic and fire safety risks, and for improperly withholding information regarding the Jocassee Dam's potential to cause a total meltdown at Oconee.

Hoboken, New Jersey, suffered over $100 million in damage during Hurricane Sandy due to a history of ignoring scientific evidence in urban planning and infrastructure development. In response, Mayor Dawn Zimmer released the August 2013 Hoboken Resiliency and Readiness Plan, which prioritizes science-based flood mitigation, such as installing 'wet weather' pumps and creating green infrastructure like rain gardens. The city faces significant risk as 53 percent of its 50,000 residents live less than five feet above the local high tide line, with nonwhite and African-American residents disproportionately affected. The document argues that while the city is now better prepared, sustained political leadership is required to resist risky waterfront development and address the long-term effects of sea level rise.

The report examines the systemic failure of the U.S. coastal insurance market, specifically the National Flood Insurance Program (NFIP), which provides subsidized rates that encourage risky development and create massive taxpayer liability. It highlights how climate change—manifesting as sea level rise and stronger hurricanes—is exacerbating these risks, particularly along the East and Gulf Coasts. The author advocates for the full implementation of the Biggert-Waters Flood Insurance Reform Act of 2012 and further measures, such as incorporating sea level rise projections into FEMA flood maps and providing targeted support for low-income homeowners.

The document examines how Hoboken, New Jersey, has historically prioritized short-term economic development over flood risk science, leading to significant vulnerabilities. It details the devastating impacts of Superstorm Sandy and the subsequent implementation of the Hoboken Resiliency and Readiness Plan, which aligns local efforts with federal climate and rebuilding strategies to address sea level rise and extreme weather.