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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 report examines the role of nuclear energy in producing zero-carbon fuels (ZCFs) to decarbonize the marine shipping industry, which accounted for 2.6% of global CO2 emissions in 2018. It identifies ammonia as a particularly promising fuel due to its energy density and compatibility with existing engine technology. The authors argue that nuclear energy is well-suited for ZCF production because of its high capacity factor, low land-use requirements, and ability to provide high-temperature steam for electrolysis. The document proposes using the U.S. Jones Act and other federal programs to incentivize the construction of ZCF-powered vessels and the development of regional production hubs, specifically suggesting the Houston region as a potential case study.

The testimony advocates for carbon capture and sequestration (CCS) as a vital tool for Pennsylvania to reach net-zero emissions by 2050. It identifies Western Pennsylvania as the most geologically favorable region for CO2 storage, estimating a potential capacity of 75.6 gigatonnes in deep saline formations, though it notes this figure may be overly optimistic. The author suggests that initial CCS projects should target 15 identified steel, cement, and power plants in the west to minimize transport costs, proposing a 'hub' model to achieve economies of scale. The testimony also highlights the potential for Pennsylvania to use its natural gas resources to produce clean hydrogen via reforming with CCS. To enable this transition, the author calls for federal policy support, specifically the enhancement of 45Q tax credits to $85 per metric ton and the passage of the SCALE Act, as well as the adoption of a state-level Clean Energy Standard.

Climate Central developed an Urban Heat Intensity Index for 159 U.S. cities, finding that New Orleans, Newark, New York City, Houston, and San Francisco have the highest intensity scores. The report identifies albedo, lack of greenery, population density, and building height as primary drivers of the UHI effect. These conditions exacerbate heat waves, worsen air quality through ground-level ozone formation, and disproportionately affect vulnerable populations, particularly those in formerly redlined neighborhoods. Proposed solutions include short-term emergency cooling measures and long-term infrastructure changes such as planting trees, installing green and cool roofs, and deploying solar energy.

Singapore aims for climate neutrality after 2050, focusing on hydrogen as a key decarbonization enabler due to its limited renewable energy potential. The country's economy is heavily export-oriented, with industrial activities and the power sector contributing 46% and 39% of GHG emissions, respectively. Singapore is exploring low-carbon hydrogen for electricity generation, heavy-duty transport, and industrial fuel, while considering ammonia for maritime bunkering. While blue hydrogen is feasible, the lack of domestic geological formations for CO2 storage necessitates partnerships with neighboring countries. Singapore leverages its position as a global port and refining hub to aim for a future role as a hydrogen hub within a developing global supply chain.

The document outlines the systemic health and environmental costs of plastics, from fossil fuel extraction to waste management, and warns that projected production growth will consume a substantial portion of the remaining global carbon budget.

The document argues that rising sea levels and extreme coastal flooding threaten approximately 2,000 Superfund sites along the US East and Gulf Coasts, potentially releasing hazardous chemicals into nearby communities. It highlights that these risks disproportionately affect communities of color and low-income households, who are more likely to live near these sites. The authors criticize the Trump administration for sidelining climate science and rescinding resilience-focused executive orders, and they recommend a new executive order and interagency coordination to integrate climate science into Superfund site risk assessments.

The document features a discussion on the critical need for resilient housing and community-based energy solutions in island territories following disasters like Hurricane Maria. Panelists emphasize that resilience is achieved through 'community strength' and self-sufficiency rather than dependency on centralized government systems. Key strategies include the deployment of distributed solar energy to create 'energy oases' for critical infrastructure and the use of the 'Keep Safe' guide to implement multi-risk mitigation in housing design. The discussion highlights the intersection of climate risk, housing insecurity, and the necessity of local workforce development to maintain resilient infrastructure.

The report examines the increasing need for energy resilience in the Upper Roaring Fork Valley, Colorado, following the 2018 Lake Christine Fire. It argues that traditional grid hardening and backup generators are insufficient and proposes a shift toward distributed energy resources (DERs) and community-centric planning. Through a partnership between Holy Cross Energy (HCE) and local stakeholders, the report identifies five priority resilience areas: community microgrids, bulk power supply flexibility, mobile generation fleets, gasoline pump resilience, and critical end-use efficiency. It emphasizes the need for 'blue sky' value—benefits during normal operations—to justify the cost of 'black sky' emergency investments and recommends new business models, such as split ownership and updated tariffs, to facilitate the deployment of clean energy resilience solutions.

The study finds that the extreme two-day rainfall during Tropical Storm Imelda in September 2019 was made more likely and more intense by anthropogenic climate change. Observational data suggests the probability of such an event has increased by a factor of 2.6 since 1900, while climate model synthesis indicates a probability increase of 1.5 to 3.1 times and an intensity increase of 9% to 21%. The report also notes that rapid urban expansion and loss of impervious cover in Southeast Texas have exacerbated flooding risks for approximately 6.6 million people in the impacted counties.

The document details how the 115th Congress integrated resilience into various sectors through legislation like the Disaster Recovery Reform Act and the National Defense Authorization Act. It highlights the rising economic costs of climate-driven disasters, the importance of pre-disaster mitigation, and the role of nature-based infrastructure in reducing risk. The authors argue that while progress has been made in defense, water, and transportation, the federal government must further institutionalize climate adaptation and resilience metrics to protect lives and property.

The document details how the 115th Congress integrated resilience into various sectors through legislation like the Disaster Recovery Reform Act, the Water Resources Development Act, and the National Defense Authorization Act. It highlights the rising economic costs of inaction, noting that 2017 alone saw $312.7 billion in disaster damages. The text emphasizes the shift toward pre-disaster mitigation, nature-based infrastructure, and the need for the 116th Congress to address energy grid resilience and National Flood Insurance Program reform.

The report finds that the incremental cost of building ZER homes is modest, averaging 1.8%, while ZE homes average a 7.3% premium. These costs often fall below consumer willingness-to-pay and mortgage-savings thresholds. The analysis identifies heat pumps, LED lighting, and ENERGY STAR appliances as cost-optimal measures and projects that ZE incremental costs will drop to 3.1%–5.5% by 2030 due to declining solar PV costs and efficiency gains. It emphasizes the need for skilled labor training and supportive policy frameworks to accelerate adoption across various US climate zones.

The report finds that building electrification is generally cost-effective for new construction and for customers switching from propane or heating oil, but often more expensive for existing natural gas customers at current prices. It argues that electrification reduces carbon emissions in most US regions, except those heavily dependent on coal, though this is expected to change as coal plants retire. The authors emphasize that demand flexibility—shifting energy use to low-cost or high-renewable periods—can further improve economics and grid integration. Key recommendations include prioritizing the electrification of oil and propane homes, stopping the expansion of natural gas infrastructure, and updating energy efficiency standards to account for total energy reduction across fuels.

The document outlines the development of 'climate attribution' science, which allows researchers to quantify the role of human-caused climate change in extreme weather. It identifies that evidence is strongest for heat waves, coastal flooding, and extreme precipitation, while remaining less conclusive for tornadoes and thunderstorms. The text provides specific examples of US events, such as Hurricane Harvey and the February 2017 heat wave, where climate change significantly increased likelihood or intensity.

The Union of Concerned Scientists reports that the EPA's January 25, 2018, withdrawal of the "once in, always in" (OIAI) policy allows industrial facilities to be reclassified from "major sources" to "area sources" of hazardous air pollutants (HAPs). This reclassification removes the requirement for facilities to use Maximum Achievable Control Technology (MACT), which the authors estimate was used by 70 percent of major sources in 2014 to keep emissions at or below thresholds of 10 or 25 tons per year. The document warns that area sources are not regulated or inspected as stringently, potentially increasing emissions of toxic substances like chlorine, benzene, and styrene. The analysis identifies at least 21 states at risk of increased pollution, with specific high-risk clusters in Louisiana's "Cancer Alley," Houston, Chicago, and the New York-Newark urban area.

The Union of Concerned Scientists evaluated ConocoPhillips across four metrics from July 2016 to June 2018. While the company showed improvements in climate risk disclosure and planning for carbon pollution, it received an 'Egregious' score for renouncing disinformation due to its continued leadership roles in trade associations that spread climate disinformation and its use of language that misrepresents climate science.

The document outlines four specific actions for cities to achieve carbon-free electricity: implementing LED smart streetlighting, creating electric districts by removing natural gas infrastructure, installing municipal solar photovoltaics, and leveraging renewable energy supply mechanisms like power purchase agreements.

The document highlights how Hurricanes Irma and Harvey triggered toxic spills and explosions at industrial sites and Superfund locations in Texas and Florida. It specifically cites the Arkema chemical plant explosion and benzene contamination in Houston's Manchester neighborhood. The text argues that these disasters are exacerbated by the Trump administration's delays of the Financial Assurance Rule and the Chemical Disaster Rule, as well as insufficient federal regulation of coal ash ponds. It emphasizes that low-income communities and communities of color bear a disproportionate burden of these environmental hazards.

The document analyzes the challenges that high levels of variable renewable energy (VRE) pose to current restructured wholesale electricity markets, specifically regarding the erosion of the price-duration curve's central gradient used for long-term cost recovery. It proposes two future market paths: one continuing to rely on spot markets enhanced by demand elasticity and storage, and another 'bifurcated' model that separates a long-term 'firm market' for capital-heavy assets from a residual spot market for real-time balancing.