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New research from Climate Central indicates that climate change accounted for 27% of the rate of heat-related emergency room visits in the U.S. during the warm seasons from 2018 to 2025. The study found that all U.S. regions experienced increased visit rates due to climate change, with the highest rates occurring in southern and western states. A notable peak occurred during the June 2021 northwestern U.S. heat wave, where daily visit rates were approximately 50 times higher than the regional average, with 27% of that rate attributed to climate change.

Recent European heatwaves have forced nuclear plants in France, Romania, and Hungary to reduce output or shut down due to high river temperatures and low water levels, which trigger environmental protections for aquatic ecosystems. While these disruptions are environmental operating constraints rather than safety failures, they highlight the need for climate-resilient design. Adaptation options include transitioning to indirect or dry cooling systems, utilizing deeper seawater for coastal plants, and deploying advanced reactors or small modular reactors that require less water. The document emphasizes that these challenges are shared by other thermal power plants and that future energy planning must incorporate projected climate conditions into siting and design.

The report finds that human-induced climate change has reduced rainfall in Jamaica by approximately 6% and in Puerto Rico by about 9%. These changes have increased the likelihood of severe effective precipitation events in both regions compared to a pre-industrial climate. The study highlights that warmer temperatures intensify drought severity through higher evaporation, making the 2026 early wet season rainfall deficits more frequent and severe.

The document outlines the health risks of wildfire smoke, specifically PM2.5 particulates, and provides guidance for reporters on highlighting vulnerable populations and using tools like the Air Quality Index (AQI). It notes that wildfire smoke can be up to 10 times more harmful in the short term than industrial pollutants and cites a study estimating 70,000 annual deaths in the US by 2050.

The 2026 floods in Upper Assam, which affected over 500,000 people and caused at least 99 deaths, were driven by high exposure and structural vulnerability rather than climate-driven rainfall increases. Analysis shows the rainfall events had return periods of less than two years and that human-induced warming of 1.4°C did not materially alter their likelihood or intensity. The study highlights that unplanned urbanization, deforestation, and colonial land policies have increased vulnerability, while reliance on rigid embankments has proven insufficient for adaptation.

The 2026 wildfire season has seen record-breaking burn areas, with roughly 579,000 square miles burned globally in the first four months. This trend is driven by a powerful El Niño, hydroclimate 'whiplash', and the expansion of fires into previously immune regions. These conditions have led to over 110 military deployments across 49 countries between January and July 2026, straining defense priorities and threatening critical infrastructure. The document analyzes different military response models—ranging from Spain's dedicated standing unit (UME) to Indonesia's integrated civilian-military approach—and recommends expanding collaborative models, investing in joint training, and building international interoperability to manage wildfires as a standing security challenge.

The document outlines the severe health risks associated with wildfire smoke, particularly fine particulate matter (PM2.5), which is linked to respiratory crises, cardiovascular events, and premature deaths. It highlights that these impacts are exacerbated by social inequalities and affect vulnerable groups such as children, the elderly, and pregnant women. Beyond immediate smoke, the guide warns of long-term mental health issues and toxic contamination of soil and water by lead and asbestos. It encourages journalists to connect these events to fossil fuel use and to utilize specific air quality monitoring tools and expert sources.

Analysis of 243 to 247 major U.S. cities reveals that 95% have seen an increase in unusually warm summer nights since 1970, with an average increase of 24 nights per summer. Using the Climate Shift Index (CSI), the report finds that human-caused climate change now strongly influences an average of 27 warm summer nights per year, compared to just one in the 1970s. The most severe impacts are concentrated in Florida and Puerto Rico, where some cities experience over two months of climate-driven warm nights annually. These trends exacerbate heat stress, disrupt sleep, and increase energy demand for air conditioning, disproportionately affecting vulnerable populations and those in urban heat islands.

The document outlines the expected impacts of El Niño across Latin America and the Caribbean, highlighting risks such as water shortages in Colombia, agricultural losses in Mexico and Central America, and fisheries disruptions in the South Pacific. It emphasizes that while El Niño is a natural phenomenon, climate change intensifies its effects, leading to more frequent extreme weather events. The guide also lists specific resources, expert contacts, and training programs for journalists covering these issues.

Analysis of cooling degree days (CDD) shows that 97% of 241 major U.S. cities experienced increased cooling demand since 1970, with an average increase of 37%. This trend, combined with a 31% rise in residential electricity prices between 2020 and 2025, increases the financial burden on households, particularly low-income families. In 2020, the ten states with the highest cooling costs saw average household expenditures between $378 in Hawaii and $712 in Arizona. Future projections suggest U.S. household cooling demand will rise 43% by 2050. The report also highlights systemic risks, including electricity grid strain, increased carbon emissions from fossil-fuel-reliant cooling, and the urban heat island effect caused by waste heat from air conditioners.

A study by the Union of Concerned Scientists and UC Merced finds that human-caused climate change has significantly reduced snowpack and streamflow while increasing irrigation demand in the western US. Approximately half of these impacts are attributed to the emissions of 'Carbon Majors'—the 122 largest industrial CO2 emitters. The report highlights severe consequences in agricultural regions like California's Central Valley, where Carbon Majors' emissions are linked to 10% of groundwater loss, and argues for the financial accountability of these companies for climate-driven water damages.

The report finds that 23% of Americans with disabilities believe global warming is harming their health, a higher proportion than the 14% of Americans without disabilities who feel the same. Despite this, the study suggests many people with disabilities may underestimate their risks. Additionally, Americans with disabilities report lower levels of trust in federal agencies and climate scientists as sources of health information compared to those without disabilities, while both groups maintain similar trust in primary care doctors and first responders.

The report finds that Americans with disabilities are more likely to perceive global warming as harming their own health than those without disabilities, though a majority of both groups may still underestimate these risks. It also highlights a significant trust gap, with disabled Americans showing lower trust in federal agencies and climate scientists, while maintaining similar trust in primary care doctors and first responders.

The European summer of 2026 has been marked by exceptional heat and widespread dryness, leading to severe agricultural and hydrological impacts. Analysis shows that while precipitation trends vary by region, human-induced climate change has significantly increased the likelihood and intensity of drought by driving higher potential evapotranspiration (PET). In the western region, soil drought is estimated to be 5 times more likely than in a climate 1.4°C cooler, while in the eastern region, it is about 11 times more probable. The study highlights a compound crisis where rainfall deficits that previously would not have caused drought now do so because of shifted thresholds driven by warming.

Climate Central's analysis of 239 major U.S. cities from 1970 to 2025 found that 95% of these cities experienced an increase in 'mosquito disease days'—days with temperatures suitable for West Nile virus transmission. On average, these cities saw an increase of 18 days per year. The largest increases occurred in the Southeast, Northeast, and Northwest regions, with San Francisco, CA, seeing the highest increase of 52 days. The report also notes that while West Nile virus is the most common mosquito-borne disease in the U.S., warming is expanding the risk and range of other viruses like dengue and Zika, particularly along the Gulf Coast and into the Ohio Valley and Upper Midwest by 2050.

The report examines the 'polycrisis' created by the convergence of climate change and armed conflict, which amplifies threats to global public health and disproportionately affects vulnerable populations. It highlights the role of military emissions and disinformation in exacerbating these crises and calls for integrated climate, health, and peacebuilding strategies.

The document outlines how climate change affects mental health through acute impacts following disasters and chronic stress from environmental degradation. It highlights that these impacts are unevenly distributed, disproportionately affecting vulnerable groups in Latin America and Spain. The guide advises journalists to avoid pathologizing legitimate emotional responses, protect source dignity, and follow WHO/PAHO guidelines when reporting on suicide.

The U.S. experienced 12 billion-dollar weather and climate disasters from January to June 2026, causing at least $31.9 billion in damages and 183 fatalities. This period ranks fifth for the most events in the first half of any year since 1980. Severe storms were the dominant disaster type, accounting for eight of the 12 events. Historically, the average number of such disasters per year has risen from three in the 1980s to 20 events annually between 2016 and 2025, with the average time between events shrinking from 82 days to 16 days in the same comparison.

Climate change is increasing the severity, size, and duration of wildfires in Canada, leading to record-breaking seasons in 2023 and 2025. These events cause significant public health crises through smoke inhalation, substantial economic losses in infrastructure and the forestry sector, and disproportionate impacts on Indigenous communities. The document argues for a dual approach of protecting communities through fire resilience and accelerating the transition from fossil fuels to limit further warming.

The document details the increasing intensity and scale of Canadian wildfires driven by climate change, highlighting record-breaking seasons in 2023 and 2025. It analyzes the severe health consequences of wildfire smoke, the economic burden of disaster recovery and insurance, and the disproportionate impact on Indigenous populations. The text argues for a dual approach of defensive adaptation and offensive mitigation through the phase-out of fossil fuels.