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Hurricane Melissa, a Category 5 storm, caused widespread destruction and 61 deaths across Jamaica, Haiti, and the Dominican Republic in October 2025. Analysis indicates that climate change increased the likelihood of the extreme conditions that fueled the storm by a factor of about 6 and increased the intensity of associated rainfall by more than 9%. In Jamaica, 5-day rainfall events are now about 30% more intense and twice as likely, while in eastern Cuba, intensity increased by 50% and frequency by a factor of 9. The storm's maximum wind speeds are estimated to be approximately 7% more intense due to warming. Despite financial risk strategies like catastrophe bonds, damages in Jamaica are estimated to be at least an order of magnitude larger than available finance.

A research paper by World Weather Attribution finding that climate change made the extreme fire weather conditions of 2025 in Türkiye, Greece, and Cyprus approximately 10 times more likely and significantly more intense.

A research analysis by World Weather Attribution finds that human-induced climate change made a July 2025 heatwave in Norway, Sweden, and Finland approximately 2°C hotter and at least ten times more likely than in a preindustrial climate. The event caused significant strain on healthcare systems, disrupted reindeer grazing and Sámi livelihoods, and led to increased drowning deaths and wildfires. The report highlights that current winter-focused building designs in the Nordic region are inadequate for rising temperatures and that similar heatwaves are now twice as likely as they were during the previous major event in 2018 due to a global warming increase from 1.1°C to 1.3°C.

Analysis of 247 U.S. cities shows a significant increase in sweltering summer nights influenced by climate change, with average annual occurrences rising from one in the 1970s to approximately 27 currently. Nighttime temperatures have risen by an average of 3.1°F across 231 analyzed locations, with the Southwest experiencing the highest regional warming and Florida cities seeing the largest increases in climate-fueled warm nights.

Between 2020 and 2024, climate change increased the number of 'pregnancy heat-risk days'—days exceeding the 95th percentile of local temperatures—in every analyzed country. In 90% of countries and 63% of cities, these risk days at least doubled compared to a world without climate change. The most significant increases occurred in developing regions, particularly the Caribbean, where 15 countries saw an average of at least 60 additional risk days annually, representing roughly one-fifth of a typical pregnancy. Beyond heat, the report notes that climate-driven air pollution, flooding, and infrastructure damage further threaten maternal health and birth outcomes.

A World Weather Attribution analysis finds that human-induced climate change made the extreme heat in South Sudan in February 2025 at least 2C hotter and at least 10 times more likely. The report highlights that women and girls bear disproportionate impacts due to their roles in agriculture and unpaid care work, as well as systemic inequalities in education and health. The study notes that extreme heat exacerbates malnutrition for 860,000 children under five and increases risks for 1.1 million people in overcrowded shelters due to conflict.

The Union of Concerned Scientists finds that the 122 largest fossil fuel and cement producers, termed 'Carbon Majors', are responsible for nearly half of present-day surface temperature increases and nearly one-third of observed global mean sea level rise. The research indicates that past emissions from these entities have already guaranteed an additional 10 to 22 inches of sea level rise by 2300. The document argues that these corporations knowingly misled the public and obstructed climate policy, and it advocates for using legal pathways and multilateral negotiations to hold them financially and legally responsible for climate damages, particularly for vulnerable island nations.

Climate Central analysis shows that human-caused climate change significantly increased the number of days with maximum temperatures exceeding 90°F in West Africa's cocoa belt from 2015 to 2024. The most severe impacts occurred in Côte d'Ivoire and Ghana, where climate change added approximately 40 days of growth-limiting heat per year. These temperature extremes, combined with shifting rainfall patterns and pests, threaten global cocoa supplies, increase chocolate prices, and endanger the health and livelihoods of small-scale farmers.

The study finds that human-induced warming from burning fossil fuels made peak January Fire Weather Index (FWI) conditions 35% more probable and 6% more intense. It also notes that the dry season has lengthened by approximately 23 days, increasing the overlap between available fuel and the Santa Ana winds. While climate models show varying results on precipitation trends, the overall evidence indicates that climate change has increased the likelihood of devastating fires in the region, with disproportionate impacts on elderly, disabled, and lower-income populations, including Black residents in Altadena.

The report finds that global warming of 0.3°C since 2015 has already increased the annual average of hot days by 11 per country. While current emissions pledges have reduced projected warming from 4°C to 2.6°C, the latter would still result in an average of 57 additional hot days per year compared to today. Case studies of six major heat events show that some would have been nearly impossible without climate change, and all have increased in intensity and likelihood. The document argues that while heat early warning systems have expanded, adaptation finance and systemic urban and labor reforms are insufficient to meet the escalating risks.

The document reports that human-induced warming of 1.3°C contributed to record-breaking temperatures, floods, and droughts in 2024, resulting in thousands of deaths and millions of displacements. It highlights that climate change added an average of 41 dangerous heat days globally and often overrode natural phenomena like El Niño. The report calls for a rapid transition from fossil fuels, improved early warning systems, real-time heat death reporting, and increased finance for developing countries to support adaptation.

A study by scientists from the Philippines, UK, and Netherlands found that human-induced climate change, primarily from burning fossil fuels, increased the likelihood of the potential intensity observed during the 2024 late typhoon season in the Philippines by a factor of 1.7. The analysis focused on the sequence of six storms hitting northern Luzon, including Super Typhoon Man-Yi, and found that the probability of at least three major typhoons making landfall in a single year has increased by 25% in the current 1.3°C warmed climate compared to a world without fossil fuel combustion.

The report finds that climate change is significantly increasing the number of 'lost winter days' (days above freezing) across Canada, with some regions seeing an additional week of such days annually. The analysis highlights specific impacts in provinces like Prince Edward Island and Nova Scotia, and major cities including Vancouver, Toronto, and Montreal, noting consequences for snow accumulation, ice coverage, and winter industries.

The study finds that heavy precipitation events leading to severe flooding in Sudan are no longer rare in a climate 1.3°C warmer than pre-industrial levels, with such events now expected approximately every three years. Climate models indicate that human-induced warming has roughly doubled the likelihood of these events and increased their intensity by about 10%, with observed 30-day rainfall intensity in the study region increasing by 18% since 1981. The report emphasises that these climate risks are compounded by 'risk multipliers' including ongoing conflict, poverty, rapid urbanisation, and ageing infrastructure, which have created a displacement crisis in Sudan, Chad, and Nigeria. The authors argue that the transboundary nature of river systems in sub-Saharan Africa necessitates improved international coordination for flood management and early warning systems to mitigate future disasters as warming reaches 2°C.

The study finds that human-induced climate change has increased the intensity of heavy 3-day rainfall events in Nepal by approximately 10% and their likelihood by about 70% compared to a 1.3°C cooler climate. These climate drivers combined with rapid urbanisation in the Kathmandu Valley—which saw a 386% increase in built-up areas between 1990 and 2020—and a 28% reduction in forest cover from 1989 to 2019, significantly increased flood exposure and disrupted natural drainage. The analysis notes that the 2015 Gorhka earthquake and the COVID-19 pandemic acted as compounding factors that increased vulnerability. While the Department of Hydrology and Meteorology provided forecasts, the Kathmandu Valley has historically not been the focus of flood risk management, which typically prioritises the Terai region.

The analysis finds that climate change made rainfall approximately 10% heavier in both the coastal and inland regions affected by Hurricane Helene and increased the likelihood of such rainfall totals by 40% and 70%, respectively. The study also indicates that climate change increased the number of storms with similar wind speeds by about 150% and made the record-hot sea surface temperatures over the storm's track 200-500 times more likely. While the storm was well-forecast, high death tolls occurred inland due to mountainous terrain, poor infrastructure, and a lack of experience with hurricanes.

The study finds that climate change increased rainfall intensity in Taiwan and Hunan province and contributed to a 7% increase in maximum wind speeds for similar storms in the Western North Pacific basin. While sea surface temperatures as hot as those observed during Typhoon Gaemi were "almost impossible without climate change", the analysis did not identify a significant trend for rainfall in the northern Philippines. The report highlights that existing urban plans and flood infrastructure are unable to withstand climate-driven extreme floods, particularly in areas of unplanned urban development like Metro Manila.

The study analyzes severe flooding in Afghanistan, Pakistan, and Iran during April and May 2024, which caused hundreds of deaths and significant infrastructure damage. While the event occurred outside the typical winter rainfall season, researchers found that a declining El Niño increased the likelihood of such rainfall by approximately two times and intensity by about 8% compared to neutral years. The analysis concludes that human-induced climate change cannot be definitively attributed as the main driver due to discrepancies between observational data and climate model signals, although a 40-year observational trend shows an increase in heavy rainfall. The report emphasizes that high vulnerability—driven by deforestation, unplanned urban expansion, and limited water management—exacerbated the disaster's impact.

The study finds that human-induced climate change, driven by the burning of fossil fuels, made the extreme rainfall events in Rio Grande do Sul more than twice as likely and increased their intensity by 6-9%. The El Niño Southern Oscillation also played a significant role, increasing the likelihood of such events by a factor of 2-5. The floods affected over 90% of the state, causing 169 deaths and displacing over 580,000 people, with impacts exacerbated by poverty, failing flood protection infrastructure in Porto Alegre, and inconsistent enforcement of environmental protection laws.

A World Weather Attribution study found that human-caused climate change increased the likelihood of extreme heat for 6.3 billion people globally, adding an average of 26 extreme heat days per location over the last year.