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The document outlines the drivers of saltwater intrusion, including sea-level rise and groundwater extraction, and details its impacts on agriculture, human health, and ecosystems. It suggests reporting strategies such as using visual tools to identify 'ghost forests' and distinguishing between 'solutions' and 'strategies' for adaptation.

Hawaiʻi faces significant economic and security risks from sea level rise, wildfires, and drought, which threaten both civilian infrastructure and critical US military hubs like Joint Base Pearl Harbor-Hickam. While federal agencies provide essential monitoring and recovery support, proposed FY 2026 budget cuts would eliminate key programs such as the Hawaiʻi Sea Grant and the Pacific Islands Climate Adaptation Science Center, potentially reducing disaster relief and hindering climate adaptation efforts.

The report identifies 5,500 hazardous facilities along US coastlines at risk of 100-year coastal flooding by 2100 under a high-emissions scenario (RCP 8.5). It highlights that marginalized populations—including renters, non-voters, and those in poverty—are 15-41% more likely to live within 1 kilometer of these sites. The risk is heavily concentrated, with nearly 80% of at-risk facilities located in seven states, and specific infrastructure like fossil fuel ports and terminals are particularly vulnerable, with over 40% expected to be at risk.

The document details South Carolina's high susceptibility to sea level rise, hurricanes, and droughts, noting that 101 weather disasters with losses over $1 billion occurred between 1980 and April 2025. It highlights the critical role of federal support from NOAA, FEMA, and USDA in maintaining coastal resilience, providing disaster aid, and supporting military installations. The briefing warns that proposed FY 2026 budget cuts—including the elimination of the Sea Grant program and significant reductions in coastal research and FEMA funding—would severely hinder the state's ability to manage climate risks and protect its economy and national security infrastructure.

The document outlines the drivers and impacts of sea-level rise, noting that global levels have risen 8-9 inches since 1880. It highlights the disproportionate risk to marginalized communities and older adults, explains the mechanics of 'compound flooding' and subsidence, and directs reporters to data tools from NOAA, the Permanent Service for Mean Sea Level, and the Nevada Geodetic Laboratory.

The guide explains that global sea levels have risen 8-9 inches since 1880, leading to more frequent coastal flooding. It highlights the disproportionate impact on elderly and marginalized communities and provides technical guidance on using NOAA data and understanding compound flooding and land subsidence.

The Danger Season 2025 microsite integrates National Weather Service (NWS) alerts, population data, social disadvantage metrics from the Climate & Economic Justice Screening Tool (CEJST), Climate Central’s Climate Shift Index (CSI), and EPA/AirNow’s Air Quality Index (AQI). The methodology focuses on the period from May to October, identifying counties under extreme weather alerts or experiencing unhealthy air quality. It calculates four daily indicators: the total population facing alerts, the percentage of disadvantaged people affected, the percentage of the population facing at least one alert, and the proportion of extreme heat alerts attributable to climate change. The scope includes the contiguous United States, Alaska, Hawai'i, Puerto Rico, and the U.S. Virgin Islands, though certain datasets like CSI and AQI have specific geographic gaps.

The analysis finds that approximately 2.5 million people and 1.4 million homes in the contiguous U.S. are at risk from a severe coastal flood by 2050 under current global carbon reduction commitments. Florida, New York, and New Jersey are the most affected states. The report highlights that older adults are disproportionately exposed, with 540,000 people aged 65 and older living in at-risk areas.

The report projects that by 2050, approximately 2.5 million people in 1.4 million homes across the contiguous U.S. will be at risk from severe coastal floods under the SSP2-4.5 pollution pathway. Florida, New York, and New Jersey face the highest risks in terms of population and housing, while Louisiana has the largest land area at risk. New York City is identified as the city with the highest number of people at risk. The analysis highlights that older adults and socially vulnerable populations are disproportionately exposed to these risks.

The report finds that continuing current housing development patterns in Canada could lead to hundreds of thousands of new homes being built in high-hazard flood and wildfire zones by 2030. This trajectory could increase annual flood losses by up to $2 billion and wildfire losses by $1.1 billion. The analysis highlights significant gaps in provincial and territorial land use policies, which often delegate risk management to under-resourced municipalities. It also identifies moral hazards in disaster assistance programs and a critical lack of up-to-date hazard mapping and real estate disclosure. The report recommends that governments implement nationally consistent risk standards, reform disaster aid to deter risky development, and mandate hazard disclosure in real estate transactions to ensure housing affordability is not undermined by climate-driven destruction.

Maryland is experiencing accelerating climate risks, including rising sea levels, more frequent extreme precipitation, intensified droughts, and increasing temperature extremes. These changes are causing significant land loss, infrastructure damage, and public health crises, necessitating costly adaptation measures such as seawalls, flood-proofing, and cooling systems.

The report details how climate change is increasing the frequency and severity of extreme weather in Michigan, leading to significant infrastructure damage, public health risks, and economic losses in tourism and agriculture.

The document details the disproportionate environmental burdens faced by Latino communities in the U.S. and California, highlighting higher rates of drinking water contamination, increased vulnerability to coastal flooding, and limited access to nature. It advocates for specific legislative bills to address offshore drilling, plastic pollution, and sea-level rise, while noting strong Latino support for ocean protection and public beach access.

The document advocates for the protection of marine ecosystems and the rights of Latino communities to clean water and equitable coastal access. It highlights the disproportionate impact of climate disasters and pollution on Latinos and lists specific legislative bills to address offshore drilling, deep-sea mining, plastic pollution, and NOAA funding.

The report details a spatial modelling approach to assess climate risks for new housing in Canada, focusing on flood and wildfire hazards under current and 2030 RCP 4.5 scenarios. It describes the allocation of new units across 5,161 census subdivisions and the specific estimation methods used to determine average annual loss (AAL) for these new developments.

The report outlines the technical process of combining Fathom's Global Flood Map (v3.1) with Public Safety Canada's residential building data and probabilistic vulnerability functions. It describes the use of 'big data' from US FEMA insurance claims to model damage distributions across 10 residential building types. The methodology accounts for flood defenses based on urbanization levels and applies the trapezium rule across eight return periods to estimate economic losses. Results show that Canada's defended AAL is projected to increase from 1,423 million CAD in 2020 to 1,681 million CAD by 2050, while undefended AAL is significantly higher, reaching 5,050 million CAD by 2050.

Climate Central analyzed annual coastal flood risks for 23 U.S. cities using Risk Finder and the Coastal Risk Screening Tool. The analysis highlights the impact of human-caused sea level rise, noting it contributed 13% of Hurricane Sandy's damages in the Northeast. For specific cities, the report identifies annual likelihoods of flooding at various levels above Mean Higher High Water (MHHW), such as a 20% likelihood for Norfolk at MHHW +4 feet. The document also notes that atmospheric warming is increasing the proportion of Category 4 and 5 hurricanes globally and may lead to more frequent back-to-back storms and rapid intensification.

Using updated CoastalDEM elevation data and IPCC medium-to-high emissions scenarios, Climate Central projects that by 2100, annual coastal flood risk zones will expand to include areas where an additional 93 million people currently live. The report highlights severe population impacts in Asia, particularly in China, Bangladesh, and Vietnam, and provides the first full assessment of population exposure in Arctic nations.

The document defines Nature-based Solutions (NbS) for adaptation—also known as ecosystem-based adaptation (EbA) and ecosystem-based disaster risk reduction (Eco-DRR)—as actions to protect, conserve, restore, sustainably use, and manage natural ecosystems to strengthen resilience against climate change. It details a four-step implementation process starting with methodology design and ending with the identification of adaptation options, grounded in participatory climate risk assessments. The text highlights specific examples of NbS, such as coral reef restoration to buffer coastal flooding and river basin management to address drought. It emphasizes that effective NbS must be gender-responsive, inclusive, and conflict-sensitive to ensure an equitable distribution of benefits.

The document outlines the bidirectional relationship between aviation and climate change, noting that global air travel emitted over 780 Mt CO2 in 2022 while simultaneously facing operational disruptions from the resulting warming. It identifies five primary climate-driven disruptions: coastal flooding threatening airport infrastructure, high temperatures reducing aircraft lift and capacity, increased lightning strike risks, shifting jet stream patterns affecting flight duration, and a rise in severe clear-air turbulence. The text emphasizes the need for the aviation industry to implement adaptation measures, such as coastal defenses and adjusted flight scheduling, to maintain safety and manage costs.