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The report analyzes a severe heatwave in July 2026 characterized by record-shattering Wet Bulb Globe Temperature (WBGT) values across the eastern US and Canada. Attribution analysis indicates that while the atmospheric circulation pattern (a 'heat dome') is characteristic of the region, the intensity of the event was substantially increased by a background climate that has warmed by 1.4°C due to fossil fuel combustion. The study emphasizes that humid heat extremes are an emerging risk, as WBGT is increasing more rapidly than absolute maximum or minimum temperatures. It also highlights the disproportionate vulnerability of low-income residents, outdoor workers, and those in historically redlined urban districts, while noting the critical role of heat action plans and cooling centers in mitigating mortality.

Europe experienced its coldest January since 2010, with temperatures 1.63°C above the 1991-2020 mean, though regional variations were significant. Forecasts for March-May 2026 project warmer-than-average temperatures across the continent, particularly in eastern and southeastern Europe, and generally weakly positive precipitation anomalies.

The document reports that Europe experienced its joint-fourth warmest December on record in 2025, with temperatures 1.99°C above the 1991-2020 mean. For the spring of 2026 (March-May), forecasts project warmer-than-average temperatures across the continent, with the highest anomalies in northeastern Europe, and generally weakly positive precipitation anomalies.

Europe experienced a warmer-than-average October 2025, with significant rainfall in the Balkans. Forecasts for the December 2025 – February 2026 winter period project warmer-than-average temperatures, particularly in northeastern Europe, and weakly positive precipitation anomalies.

A super-rapid attribution study by World Weather Attribution finds that human-induced climate change has significantly increased the likelihood and intensity of a five-year drought in Iran and the Tigris-Euphrates basin. The analysis shows that while low-rainfall years are natural to the region, the current 'extreme' to 'exceptional' drought conditions would have been very rare in a pre-industrial climate. The study highlights that warming increases evaporative demand, prolonging droughts and compounding the effects of socio-economic stressors like unsustainable groundwater extraction and water-intensive agriculture.

Europe's September 2025 was its 5th warmest on record, with significant temperature and precipitation variations across the continent. Forecasts for the December 2025 – February 2026 winter period project above-average temperatures, particularly in eastern and northeastern Europe, and weakly positive precipitation anomalies.

Europe's June 2025 was its 5th warmest on record, with record-high temperatures in England, France, Italy, and most of Spain, and record-low rainfall in the Balkans. Forecasts for August-September 2025 project temperatures 1-2°C above average across most of Europe, an increase of 1-5 warm days per month, and precipitation deficits of 10-40% in parts of southeastern and southwestern Europe.

The document reports that May 2025 saw colder than average temperatures in eastern Europe and extreme drought in the British Isles. For the July-September 2025 period, most of Europe is projected to be 1-2°C warmer than average, with expected increases in 'Warm Days' and projected negative soil moisture anomalies persisting in central Europe and the British Isles.

The text emphasizes that Brazil's vast size and climatic diversity require detailed observational studies to distinguish between natural variability and long-term climate change. It highlights that interannual variability, driven largely by El Niño and La Niña, can alter seasonal rainfall in the Amazon by a factor of more than four. The author cautions that most precipitation trends in Brazil are linked to interdecadal oscillations—such as the Atlantic Multidecadal Oscillation (AMO) and the Interdecadal Pacific Oscillation (IPO)—rather than global warming. Additionally, the document notes a trend of increasing air temperatures in the tropics of South America since 1948, contrasting with a negative trend in the subtropics since the mid-1990s, and mentions the influence of land-use change and biomass burning on air temperature in the Amazon and Cerrado.

The project focuses on enhancing disaster prevention in the Eastern Pacific by reconstructing historical cyclone records, studying lightning as a proxy for intensification, and utilizing high-resolution ocean and atmospheric models (HWRF) to improve storm surge and track forecasts.

The analysis concludes that human-induced climate change has made the June 2019 heatwave in France more likely and more intense. Observational data suggests that a heatwave of this intensity is occurring at least 10 times more frequently today than a century ago, with temperatures approximately 4C higher. While climate models qualitatively agree on the strong human influence, they show smaller trends and fewer severe heatwaves than observations, simulating a probability increase of between a factor of 2 and 20. The study emphasizes that early-season heatwaves in June have more severe health and organizational impacts than mid-summer events.

In early July 2018, southwestern Japan experienced extreme rainfall, with some interior stations recording more than twice the usual amount for the wettest day of the year, leading to local return times exceeding 200 years. Observational data from 94 stations show a higher prevalence of positive trends in extreme rainfall probability than negative trends, suggesting a systematic influence beyond natural variability. While a single high-resolution model (EC-Earth T799) qualitatively reproduces these positive trends from 1850 to 2098, the authors state that a lack of sufficient climate models and manpower prevents a robust quantitative attribution statement. The analysis concludes that climate change likely increased the probability of such extreme rains, though the exact magnitude remains undetermined.

The study concludes that anthropogenic climate change significantly increased the likelihood of the June 2017 heat event across Western Europe. Using observational data and multiple climate model ensembles, researchers found that such extreme heat is now more frequent, occurring every 10 to 30 years depending on the country. The risk ratio was highest in Portugal and Spain, where the probability of such heat increased by more than ten times due to global warming. The report also notes that under high-emission scenarios (RCP8.5), temperatures similar to June 2017 could become normal by the end of the century.

The document outlines twelve key signs of climate change, including rising global, ocean, and soil temperatures, increasing ocean acidity, and rising sea levels. It attributes these phenomena to the buildup of heat-trapping gases caused by the burning of fossil fuels and the destruction of tropical forests. The text highlights specific regional impacts, such as the rapid warming of the Gulf of Maine and the thawing of permafrost in the Arctic, and notes the resulting increase in extreme weather events and shifts in species ranges.

The report finds that Myanmar is experiencing significant warming, with inland areas warming faster than coastal ones. Projections for the mid-21st century indicate temperature increases of 1.3°C to 2.7°C and sea level rise of 20 to 41 centimeters. While wet season precipitation is expected to increase, potentially exacerbating flooding, changes in the hot and cool seasons remain uncertain. The report emphasizes the high vulnerability of the Ayeyarwaddy Delta and Central Dry Zone, advocating for ecosystem-based adaptation and the integration of climate risk data into infrastructure and agricultural planning.

The report investigates the 51°C record temperature in Phalodi, Rajasthan, on 19 May 2016. While annual mean temperatures in India are increasing, the analysis found that human-induced climate change did not play a statistically significant role in this specific event or a similar 2015 event in Andhra Pradesh. The authors suggest that the warming effect of greenhouse gases may be masked by the cooling effects of aerosols and increased irrigation. However, the report warns that as energy policies shift away from fossil fuels, the diminishing cooling effect of aerosols could increase the intensity of future heat waves.

The analysis found that while human-induced climate change slightly increased the probability of the 2016 record-breaking heat in Rajasthan, the effect was not statistically significant. The study suggests that the warming effect of greenhouse gases in India is being partially offset by the cooling effects of aerosols and increased irrigation. Despite the lack of a strong temperature trend, the combination of high heat, pollution, and humidity is increasing the health risks and mortality associated with heat waves.

The study investigates a severe drought in southern Madagascar (the Grand Sud region) between July 2019 and June 2021, which contributed to a major food security crisis. Analysis of observational data and climate models indicates that the event was a 1-in-135 year dry event, but its likelihood was not significantly increased by anthropogenic climate change. The findings suggest that natural variability remains the dominant driver of such droughts in this region, aligning with IPCC projections that perceptible changes in drought may only emerge if global mean temperatures exceed 2°C above pre-industrial levels. The report also highlights that the humanitarian impact was severely compounded by extreme poverty, poor infrastructure, and the COVID-19 pandemic.

The 2022 UK heatwave, which saw temperatures reach 40.3°C in Coningsby, was made at least 10 times more likely by human-caused climate change. Observational analysis indicates such an event would have been about 4°C cooler in pre-industrial times, though climate models systematically underestimate this trend. The event had significant impacts on human health, with projected excess mortality of over 840 people in England and Wales, and exposed critical vulnerabilities in UK infrastructure and urban planning.