A recent international report revealed that climate change has led to the addition of thirty days of extreme heatwaves for over four billion people, equivalent to half of the Earth's population, between May 2024 and May 2025. The report confirmed that this abnormal temperature increase resulted from emissions from human activities, exacerbating the impacts of heatwaves on public health, the environment, and the economy. The study, conducted by the World Weather Attribution initiative, Climate Central, and the Red Cross, highlighted that extreme heat has contributed to an increase in heat-related illnesses, fatalities, significant agricultural losses, and added pressure on energy and healthcare systems in many countries worldwide. Although major climate disasters such as floods and hurricanes often dominate headlines, the report emphasized that heatwaves are the most deadly climate phenomenon, with many deaths going unrecorded or misdiagnosed as heart or kidney-related diseases. To analyze the impact of climate change on temperatures, scientists used models to simulate Earth's climate without human carbon emissions and compared these models with actual temperature data from the past year. The results showed a doubling of extreme heat days in 195 out of 247 countries and regions included in the study, indicating a near-global spread of the phenomenon. For example, Puerto Rico, a U.S. territory, experienced 161 days of extreme heat in the past year, compared to an expected 48 days without climate change. Germany also saw 50 days of extreme heat during the same period, with 24 days directly linked to human-induced climate change, according to the analysis published today. Researchers define "extreme heat days" as those where temperatures exceed 90% of the recorded averages between 1991 and 2020, serving as a scientifically accepted indicator of temperature climate deviation. The report stressed that these findings should serve as a clear warning to governments and decision-makers worldwide to take serious steps to reduce carbon emissions and accelerate efforts to adapt to the consequences of climate change. This threat is no longer a future possibility but has become a tangible reality affecting billions, threatening public health, ecosystems, and economies globally.