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The report projects substantial warming and shifting precipitation patterns for the US Midwest, with extreme heat events and heavy rainfall becoming more frequent. Under a higher emissions scenario, end-of-century temperatures could rise by up to 10°F, significantly increasing the frequency of severe heat waves and reducing snow cover. While annual precipitation may only increase slightly, winter and spring are expected to become wetter, while summer precipitation may decrease under higher emissions. These changes are projected to increase heat-related mortality and flooding risks across the region.

The document introduces an open-source method to model the Universal Thermal Climate Index (UTCI) at a 1-meter resolution using the SOLWEIG model and open-access data. This framework allows cities to assess baseline heat risks and simulate the cooling effects of interventions such as tree planting, shade structures, and cool surfaces. The method's accuracy was validated against LiDAR-supported models, showing a mean absolute error of 0.39°C.

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.

The report examines the 2022 food crisis in the Central Sahel, which followed an erratic 2021 rainy season characterized by delayed onset and short duration. Using three observational datasets and multiple climate models, the study finds that it is impossible to significantly link these specific monsoon characteristics to anthropogenic climate change due to large uncertainties and discrepancies. Instead, the crisis is attributed to chronic vulnerabilities, including extreme poverty, armed conflict, political instability, and global economic shocks such as the war in Ukraine and the COVID-19 pandemic.

The study finds that while the 2022 drought in Central South America was primarily driven by natural variability and La Niña conditions, human-induced climate change exacerbated the event by increasing temperatures, which reduced water availability through higher evapotranspiration. The drought caused severe agricultural losses in Argentina, including a projected 25-50% decrease in soy yields and a significant drop in wheat production, while limiting potable water access for over 75,000 people in Uruguay.

Trees reduce extreme heat through evapotranspiration and shade, mitigating the urban heat island effect and protecting vulnerable populations from climate-driven temperature increases.

In the Tankwa Karoo desert of South Africa, where summer air temperatures can reach 122°F and ground surface temperatures near water can approach 140°F, birds face a choice between dehydration and lethal heat at watersides. To address this, WWF, South African National Parks, and the University of Cape Town installed wooden frames with shade cloth at waterholes. Using a "before-after control-impact" design with camera traps and thermometers, the study found that birds visited shaded sites more frequently than unshaded ones, with a higher proportion of visits occurring during the heat of the afternoon. The shade structures significantly lowered temperatures at the water's edge, with shaded areas seldom reaching 113°F compared to unshaded areas that regularly reached 122°F and sometimes exceeded 140°F.