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The document details how rising sea surface temperatures, driven by human-caused climate change, are increasing the frequency and intensity of rapid intensification in tropical cyclones. It highlights that 70% of billion-dollar tropical cyclones in the U.S. since 1980 underwent rapid intensification, contributing to over $1.4 trillion in damages and nearly 7,000 deaths.

The report finds that August 2024 temperatures were elevated across much of the U.S., particularly in the South and Southwest, with Texas experiencing the highest anomalies. Using the Climate Shift Index (CSI), the analysis shows that the Southwest and South had the highest number of days where temperatures were at least three times more likely due to climate change. San Juan, Puerto Rico, recorded its hottest August on record, and Amarillo, Texas, was the most unusually hot city, 6.27°F above normal.

The United States saw a 60% increase in major weather-related power outages during the heat season between 2014-2023 compared to 2000-2009. The South region experienced the highest number of these events, with Texas and Michigan recording the most outages at the state level. These outages compound health risks for vulnerable populations, such as the elderly and children, particularly when overlapping with extreme heat waves. Proposed solutions for grid resilience include the implementation of microgrids, smart grid technologies, and physical hardening of infrastructure.

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 report identifies six distinct climate audiences—Alarmed, Concerned, Cautious, Disengaged, Doubtful, and Dismissive—across a global survey of 139,136 Facebook users. It finds that the 'Alarmed' group is the largest in approximately 77% of the surveyed areas, with the highest concentrations in Puerto Rico and other Latin American countries. Conversely, the 'Doubtful' and 'Dismissive' groups are most prevalent in the Netherlands, Norway, and Libya. The analysis highlights a correlation between lower per-capita emissions and income and higher levels of climate alarm, while noting that the United States has a lower proportion of 'Alarmed' respondents compared to other top carbon-emitting nations.

The briefing establishes that fossil fuels are responsible for approximately 70% of carbon dioxide emissions since the industrial revolution, with a small number of companies contributing a disproportionate share. It highlights the role of attribution science in linking specific extreme weather events to climate change and details the growing trend of using the 'polluter pays' principle in litigation and legislation to hold these companies financially accountable. The document further argues that to meet the 1.5C target, global fossil fuel production must decrease significantly by 2030, supported by a transition to renewable energy and electric vehicles.

The report finds that June 2024 was historically hot across the United States, with climate change making temperatures 2.3 times more likely on average. The Southwest experienced the most extreme anomalies, with Nevada's temperatures being 8.2 times more likely due to climate change and the region seeing an average of 4.2 additional days above 90°F. Analysis of 191 ACIS stations showed that 12 experienced their hottest Junes on record, and 168 stations had at least one day where temperatures were at least twice as likely due to climate change.

As of June 2024, the U.S. has 12,164 committed electric school buses, with 67% funded by the EPA's Clean School Bus Program. Adoption is widespread across 49 states, with California leading in total numbers, while the Southeast has seen significant recent growth. The report finds that deployment is increasingly equitable, with a majority of buses now located in high-poverty districts and areas with high air pollution, though adult asthma rates show a more even distribution.

The report provides a comprehensive inventory of state-level renewable energy siting policies in the United States and Puerto Rico. It details which government entities hold jurisdictional authority for permitting large-scale wind and solar projects, examines established timelines for these processes, and outlines requirements for public involvement. Additionally, the document assesses the availability of model ordinances and permitting guides intended to support local jurisdictions.

Between March and May 2024, global temperature records were broken for three consecutive months. Using the Climate Shift Index (CSI), the analysis found that approximately one in four people worldwide experienced temperatures at least three times more likely due to climate change (CSI level 3+) daily. Exposure peaked on April 6, 2024, with 2.7 billion people affected. The most severe impacts were concentrated in Africa, Southeast Asia, Central America, and South America, with 44% of Africa's population experiencing the most extreme attributable heat (CSI level 5 for 60+ days). The report also highlights a strong regional contrast in the U.S., where coastal areas and islands showed higher CSI signals despite lower temperature anomalies compared to the Upper Midwest.

Using the Climate Shift Index (CSI), Climate Central found that human-caused climate change significantly boosted spring warmth in 2024, affecting 300 million people in the U.S. and approximately one in four people globally. The strongest influence was observed in coastal and island regions, such as Puerto Rico and Florida, while areas with the highest temperature anomalies, like the Upper Midwest, showed lower CSI levels due to higher historical temperature variance.

The document details the technical approach for mapping disruptive flooding and its impact on critical infrastructure across US territories. It describes the use of NOAA tide gauge data, digital elevation models, and three sea level rise scenarios (low, medium, and high) to project inundation. The analysis overlays these flood maps with datasets covering housing, education, industrial sites, energy, government, and health facilities, while incorporating socioeconomic data from the White House Council on Environmental Quality to assess impacts on disadvantaged communities.

The Union of Concerned Scientists analysis finds that climate-driven sea level rise will expose over 1,600 critical infrastructure assets in the US to disruptive flooding at least twice per year by 2050. Public and affordable housing are the most vulnerable assets, with a disproportionate burden falling on disadvantaged communities. By 2100, the scale of risk depends heavily on global emissions, with the high scenario potentially affecting 15,081 assets. The report recommends science-informed planning, scaled-up funding, and a focus on reducing historical inequities to build coastal resilience.

Between 2000 and 2023, 80% of major U.S. power outages were caused by weather, with a significant increase in frequency during the last decade. Severe weather, winter storms, and tropical cyclones are the primary drivers, with Texas and the Southeast region among the most affected. The document highlights the vulnerability of aging infrastructure and the disproportionate impact on marginalized and medically vulnerable populations, while suggesting grid hardening, microgrids, and emissions reductions as paths toward resilience.

The EPA has finalized a rule requiring commercial sterilization facilities to install control technology to reduce ethylene oxide emissions, which could eliminate an estimated 90% of such emissions. This action follows lawsuits by Earthjustice after the EPA missed multiple Clean Air Act deadlines to update air toxics standards. Ethylene oxide is a known human carcinogen that poses significant health risks, particularly to workers and low-income communities of color living near facilities.

Between December 2023 and February 2024, carbon pollution drove abnormal warmth for approximately 80% of the global population. Roughly 4.8 billion people experienced at least one day of temperatures that would be 'virtually impossible' without climate change. The report highlights extreme temperature anomalies in the U.S. upper Midwest and Canada, as well as high Climate Shift Index (CSI) levels in tropical regions of Southeast Asia, Sub-Saharan Africa, and the Caribbean. It also documents associated extreme weather events, including record-breaking heat in Australia and deadly floods in the Democratic Republic of the Congo.

The document provides a preliminary legal mapping of the procedural and substantive requirements for a delictual claim against Carbon Majors in South Africa. It examines jurisdictional hurdles, such as the need to attach assets for foreign defendants, and the potential for state immunity defenses for state-owned companies. Substantively, it analyzes the elements of delictual liability—wrongfulness, fault, and causation—suggesting that South African courts' flexible approach to factual causation and the use of attribution science could support such claims. It also discusses parent company liability and the possibility of holding a select group of joint wrongdoers severally liable for the full extent of damages.

The report examines how private equity firms capitalize on the growth of Medicare Advantage, particularly through insurance brokerage, marketing, and in-home health assessment companies. It highlights a surge in deal activity peaking in 2021, coinciding with regulatory rollbacks, and details risks such as dividend recapitalizations and False Claims Act violations. The author calls for stricter antitrust enforcement and joint liability for private equity owners to protect the Medicare program.

The document highlights that 2023 is virtually certain to be the hottest year on record, driven by human-caused greenhouse gas emissions. It details the resulting increase in extreme weather events, the long-term trend of rapid warming since the industrial revolution, and the necessity of transitioning to clean energy to meet global climate targets.

The Global Climate and Health Alliance (GCHA) provides legal and scientific commentary to the Inter-American Court of Human Rights, detailing how climate change exacerbates health crises in Latin America and the Caribbean. The document highlights the disproportionate impact of heat, wildfires, air pollution, and vector-borne diseases on vulnerable populations, including indigenous peoples and children. It argues that states have a legal duty under the American Convention on Human Rights and the Paris Agreement to prevent climate-related health harms. The brief recommends a transition away from fossil fuels, the elimination of 'sacrifice zones', and the adoption of sustainable land management to achieve health co-benefits and uphold human rights.