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The report argues that California's public infrastructure is deteriorating and based on outdated historical climate data, making it vulnerable to a 'new normal' of extreme heat, sea level rise, wildfires, and erratic precipitation. It proposes a 'climate-smart' framework based on rigorous science, equitable outcomes, financial transparency, and holistic planning. Key barriers identified include outdated design codes, a lack of actionable climate data for engineers, and systemic underinvestment in underserved communities. The author recommends updating state standards, establishing a centralized coordinating center for climate information, and adopting innovative financing mechanisms like resilience bonds to protect critical services and vulnerable populations.

This briefing by the Environmental and Energy Study Institute argues that the United States must proactively plan for climate-induced migration to avoid regional instability and humanitarian crises. It highlights the lack of legal protections for environmental migrants and the specific risks of agricultural decline in Mexico and Central and South America, while noting the potential strain on U.S. military resources tasked with humanitarian aid.

The document highlights the inadequacy of current refugee definitions for environmental migrants, who lack legal protections under the 1951 Refugee Convention. It warns that climate change could displace tens of millions, with the U.S. likely seeing a significant influx from Central and South America, including an estimated 6.7 million people from Mexico by 2080 due to agricultural declines. The brief emphasizes the need for the U.S. to support resiliency initiatives abroad and expand its humanitarian aid capacity, noting that the U.S. military is already a primary provider of such assistance.

The report finds that seven low-income and minority-majority communities in northern New Castle County, Delaware, face significantly higher cancer risks and respiratory hazards from toxic air pollution compared to the state average and a wealthy, predominantly White comparison community. These risks are compounded by the high density of hazardous chemical facilities, Superfund sites, and Brownfields in these areas, particularly in Southbridge. The authors recommend stricter chemical safety regulations, mandatory fenceline monitoring, and the prevention of siting schools near dangerous facilities to mitigate these disproportionate environmental health burdens.

The proposal outlines a project to enhance climate resilience in Egypt's Nile Delta and North Coast, targeting five vulnerable hotspots. It combines the construction of 69 km of soft coastal protection measures—utilizing dredged material—with the creation of a comprehensive ICZM plan to shift the country away from traditional 'hard' engineering solutions. The project is managed by the UNDP and executed by the Ministry of Water Resources and Irrigation, with a total investment of approximately USD 105.2 million, including USD 31.4 million from the GCF and USD 73.8 million in co-financing from the Egyptian government.

The analysis concludes that while Hurricane Harvey was an extremely rare event, global warming increased the intensity of its precipitation by approximately 15% and made such an event about three times more likely. Observational data and climate models indicate a trend of increasing extreme precipitation along the US Gulf Coast, often exceeding the standard Clausius-Clapeyron scaling. The study emphasizes that while the storm's rarity makes it difficult to attribute its existence to climate change, the increased rainfall intensity contributed significantly to the flooding in Houston, which was further exacerbated by urban development and subsidence.

The document details findings from a study published in Climatic Change that attributes specific percentages of global warming and sea level rise to the largest carbon producers. It highlights that the 90 largest producers contributed 57% of the atmospheric carbon dioxide rise since 1880, while 50 investor-owned companies were responsible for roughly 16% of the temperature increase and 11% of sea level rise over the same period. The text argues that these companies knew of the risks as early as 1965 but chose to misinform the public.

The Union of Concerned Scientists identifies several California communities, including Alameda and San Mateo, that face 'chronic flooding'—defined as high tides flooding 10% or more of usable land at least 26 times per year—by the end of the century. Under a high-emission scenario, these impacts could arrive by 2080. Critical national security infrastructure, such as the Naval Station San Diego, is also at risk. The document argues that limiting global warming to 1.8°C could prevent any California community from reaching the chronic flooding threshold by 2100 and urges immediate policy reforms regarding coastal development, disaster funding, and population relocation.

The Union of Concerned Scientists identifies numerous Florida communities at risk of chronic flooding—defined as high tides flooding 10% or more of usable non-wetland area at least 26 times per year. Under an intermediate sea-level rise scenario, five communities will face chronic flooding by 2035 and 53 by 2100. High-risk areas like Miami Beach and Cayo Biscayne could see 60% and 50% of their area chronically flooded by 2060, respectively. The document argues that limiting global warming to approximately 1.8°C could save between 13 and 71 Florida communities from such flooding by the end of the century. Recommended actions include updating flood risk maps, reforming insurance premiums, funding FEMA programs, and implementing population relocation strategies for chronically flooded areas.

The Union of Concerned Scientists identifies numerous New Jersey communities facing 'chronic flooding'—defined as high tides flooding 10% or more of usable non-wetland area at least 26 times per year. Under an intermediate scenario, 21 communities will face this by 2035, increasing to over 100 by 2100. Under a high scenario, 73 communities are exposed by 2060 and 131 by 2100, including Newark and Elizabeth. The report argues that reducing global warming could save 28 or more communities by 2060 and 45 to 73 by 2100. Recommended actions include updating flood risk maps, reforming insurance premiums, funding FEMA programs, and implementing population relocation strategies.

The Union of Concerned Scientists (UCS) identifies several Texas coastal communities, including the Bolivar Peninsula, Sabine Pass, and Galveston, that face chronic flooding—defined as high tides flooding 10% or more of usable non-wetland area at least 26 times per year—by 2030 to 2100 depending on the sea-level rise scenario. The document argues that reducing global warming to around 1.8°C could save between 7 and 16 Texas communities from chronic flooding by the end of the century. To address these risks, UCS proposes three policy categories: ending risky coastal development, improving existing disaster frameworks like FEMA, and creating bold new policies for population relocation and infrastructure investment in safer areas.

The Union of Concerned Scientists (UCS) identifies several California communities, including Alameda and San Mateo, that face 'chronic inundation'—defined as high tide flooding 10% or more of usable land at least 26 times per year—by 2100 under intermediate sea level rise scenarios. In a high-rise scenario, this timeline accelerates to 2080. The report highlights specific risks to military installations in San Diego and developing neighborhoods in San Francisco. However, the document notes that limiting warming to approximately 1.8°C (the 'low' scenario) could prevent any California community from reaching the 10% chronic inundation threshold by the end of the century. To address these risks, the UCS advocates for halting risky coastal development, enhancing disaster response funding, and creating new policies for managed retreat and relocation.

The Union of Concerned Scientists (UCS) identifies numerous Florida communities facing 'chronic inundation'—defined as high tide flooding 10% or more of usable, non-wetland area at least 26 times per year. Under an intermediate sea level rise scenario, five communities will face this by 2035 and 53 by 2100. In a high scenario, Miami Beach and Key Biscayne could see 60% and 50% of their areas chronically inundated by 2060, respectively. The report argues that limiting global warming to approximately 1.8°C could spare between 39 and 71 Florida communities from this fate by 2100. To address these risks, UCS advocates for halting risky coastal development, enhancing disaster response frameworks like FEMA's Hazard Mitigation Grant Program, and creating new policies for managed retreat and relocation.

The Union of Concerned Scientists (UCS) defines 'chronic inundation' as tidal flooding affecting 10% or more of a community's usable land at least 26 times per year. Under a moderate (intermediate) scenario, nearly 170 communities will reach this threshold by 2035, increasing to over 270 by 2060 and nearly 490 by 2100. A high scenario projects up to 670 communities affected by 2100, including over 50 populous cities such as New York City (four boroughs), Boston, and Oakland. The report highlights that socioeconomically vulnerable neighborhoods are disproportionately affected and argues that aggressive emissions reductions aligned with the Paris Agreement could spare hundreds of communities from this fate. Adaptation options include defending (seawalls, levees), accommodating (elevating homes, pumps), and managed retreat.

The Union of Concerned Scientists (UCS) identifies that all of Georgia's oceanfront communities face chronic inundation by 2100 under an intermediate sea level rise scenario. The report highlights that Savannah and Brunswick will see significant land area loss by 2045 and 2060, while suggesting that limiting global warming to 1.8°C could spare some communities. It advocates for a science-based approach to adaptation, including updating flood maps, reforming insurance, and creating relocation programs.

The Union of Concerned Scientists (UCS) warns that many Louisiana communities face 'chronic inundation'—defined as high tide flooding 10% or more of usable, non-wetland area at least 26 times per year—within the coming decades. Under an intermediate sea level rise scenario, 95 southern Louisiana communities will face this by 2035, increasing to 131 by 2100. In the high scenario, some areas, including all communities in Lafourche and Terrebonne Parishes, could see 90 to 100 percent of their land area chronically inundated by the end of the century. The report argues for a science-based approach to adaptation, including updating flood risk maps, reforming insurance, and creating programs for retreat and relocation.

The Union of Concerned Scientists (UCS) identifies numerous Maryland communities, particularly on the Eastern Shore, at risk of chronic inundation—defined as high tide flooding 10% or more of usable non-wetland area at least 26 times per year. Under an intermediate sea level rise scenario, 22 communities will face this by 2035 and 17 more by 2100, with some areas like Crisfield facing flooding of over half its land area within 20 years. The report emphasizes that limiting global warming could spare between 9 and 31 communities from chronic inundation by the end of the century and calls for updated flood maps, reformed insurance, and funded relocation programs.

The Union of Concerned Scientists (UCS) identifies Massachusetts communities at risk of 'chronic inundation'—defined as high tide flooding 10% or more of usable, non-wetland area at least 26 times per year. Under an intermediate sea level rise scenario, five communities will face this by 2060 and 13 by 2100. Under a high scenario, those five communities will be affected by 2045, with 23 communities affected by 2100. The report highlights that working-class towns like Chelsea and Revere are particularly vulnerable, with up to 30% of Chelsea's land area potentially chronically inundated by 2060. The UCS argues that limiting warming to approximately 1.8°C could spare several communities, including Boston and Cambridge, from this fate. Recommended responses include phasing out risky coastal development, enhancing FEMA's mitigation programs, and creating new policies for managed retreat and relocation.

The Union of Concerned Scientists identifies that under a high sea level rise scenario, four New Hampshire communities will face chronic inundation by 2100, defined as high tide flooding 10% or more of usable non-wetland area at least 26 times per year. While the 10% threshold is reached late in the century due to inland areas and higher elevations, low-lying neighborhoods in towns like Seabrook and Hampton already experience disruptive flooding. The report suggests that limiting warming to 1.8°C could spare up to four communities from this fate. Recommended policy responses include phasing out risky coastal development, enhancing FEMA's disaster response frameworks, and creating new programs for retreat and relocation.

The Union of Concerned Scientists (UCS) identifies significant risks of chronic inundation for New Jersey coastal communities, with 21 communities expected to be affected by 2035 under an intermediate scenario and over 100 by 2100. The report highlights that major metropolitan areas like Newark and Elizabeth face substantial land loss by 2100 and suggests that limiting global warming to 1.8°C could spare dozens of communities from this fate. To address these risks, UCS advocates for phasing out risky coastal development, enhancing disaster response funding, and creating new policies for managed retreat and relocation.